Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 587434: Please help me solve this quadratic equation y=x^2-25 to find the line of symmetry. I tried using the formula -b/2a, but I got a strange answer, 25/2. Thank you.

Click here to see answer by ankor@dixie-net.com(15746)

Question 587675: How to solve this!x= -1 2x-4x-2
how do you solve it
Click here to see answer by Alan3354(31518)

Question 587809: Find p(-3)for the function p(x)=4x^4+8x^3-2x^2+13x+10?

Click here to see answer by Alan3354(31518)

Question 587871: How do I solve this equation 5x^2+3x-2=0 I need to see the steps as I am struggling to understand how to solve this using the quadratic formula
Click here to see answer by mananth(12270)

Question 587861: A Broadway theater has 400 seats, divided into orchestra, main and balcony seating. Orchestra seats sell for $80, main seats for $60 and balcony seats for $40. If all the seats are sold, the gross revenue to the theater is $23,200. If all the main seats and the balcony seats are sold, but only half the orchestra seats are sold, the gross revenue is $20,000. How many are there of each seat?
I've tried solving this by writing an equation and trying to solve for x but it didn't get me the correct answer, any help would be appreciated. Thank you.
Click here to see answer by mananth(12270)

Question 587907: A new excavation site that fits a parabola with the equation y =x squared +11x+10. The hole must be more than 10m wide across the top for a bobcat to be able to dig it. If the ground level is taken as the x= axis,is the hole able to be dug by the bobcat?
Click here to see answer by josmiceli(9817)

Question 587957: Find the two numbers whose product is 3 and the larger number is 10 more than the smaller number.
Click here to see answer by Alan3354(31518)

Question 587930: X2+x-(a+2)(a+1)=0
Click here to see answer by KMST(1936)

Question 588097: -s^2+4s+32=0
Click here to see answer by stanbon(57967)

Question 588325: Please help ASAP with my algebra question. We are on quadratic equations and I am stuck on a word problem:
The area of a square can be doubled by increasing the length by 6 inches and the width by 4 inches. What is the length of the side of the square?
Click here to see answer by dfrazzetto(277)

Question 588384: The factors of 2x^2+5x+7
Click here to see answer by jim_thompson5910(28715)

Question 588428: The primeter of a rectangle is 30 cm,
Find the whole-number dimensions of the rectangle with:
(a) the greatest area
(b) the least area
Click here to see answer by solver91311(17077)

Question 588637: An object is propelled straight down with an initial velocity of 60 feet per second, from a height of 6,000 feet. How high is the object after 15 seconds?
Click here to see answer by Alan3354(31518)

Question 589117: HOW DO YOU SOLVE A QUADRATIC EQUATION BY COMPLETING THE SQUARE
Click here to see answer by josmiceli(9817)

Question 589204: x 3 8
- + - = -
100 100 100
It says to multiply both sides and i dont get what its asking, because i think is already multiplied all the way.
Click here to see answer by baseballkid35(2)

Question 589210: ANOTHER EMERGENCY, PLEASE HELP ME! ASAP
SOLVE
t^2+10t+26=0
Click here to see answer by scott8148(6628)

Question 589207: EMERGENCY!!! NEED THIS IMMEDIATELY! PLEASE HELP!
Solve by factoring completely
10t^2-t-2=0
Click here to see answer by ankor@dixie-net.com(15746)

Question 589626: the discriminant in the quadratic formula is the expression ____.
Click here to see answer by edjones(7569)

Question 589637: Solve: x+2√(x-8)=0
Possible answers are-
a. 4,16
b.-4,2
c.4
d.16
Click here to see answer by edjones(7569)

Question 589388: Please help me get the simplified answer to this equation: So far I did -21sqrt(21)^2-4(4)(5)/2(4). This equals -21+sqrt(361) all over 8, -21-sqrt(361) all over 8. How do I simplify this answer?
Click here to see answer by KMST(1936)

Question 590122: Suppose you are solving a quadtratic equation with no constant term (c = 0). Would you use factoring or the quadratic formula to solve? Why?

Click here to see answer by ankor@dixie-net.com(15746)

Question 590129: Explai a sequence of steps that can be used to solve any quadratic equation in the quickest way.

Click here to see answer by stanbon(57967)

Question 590144: I need help on how to solve quadratic equations using square roots. I have two problems I need help with:
1.) (2x+1)^2=25

Click here to see answer by Alan3354(31518)

Question 590144: I need help on how to solve quadratic equations using square roots. I have two problems I need help with:
1.) (2x+1)^2=25

Click here to see answer by richwmiller(9144)

Question 590340: Solve the equation by completing the square: 3x2 - 24x = 27.
Enter the largest value of the coordinates. Use a number only.
This is a question from my math homework. I made it to 3(x^2-24x)-27, but now I'm stuck... Please help!
Click here to see answer by Alan3354(31518)

Question 590830: the length of a floor is 7 feet longer than the width. If x represents the width of the living room, what equation represents the area, y, of the floor in square feet?

Click here to see answer by nerdybill(7003)

Question 590945: what is the root of the quadratic equation x^2-6x+9=0
Click here to see answer by richwmiller(9144)

Question 590986: solve by factoring: -2y(y+4)=0
Click here to see answer by richwmiller(9144)

Question 591156: Please show me how to set up an equation for 4x -y = 9
x= 2.
I'm not sure how to start this: Am I multiplying or subtracting? What are the steps?
4(2)-y=9

Click here to see answer by rfer(12730)

Question 591352: I do not understand quadratics...It's so frustrating! I am failing algebra 2 and this CANNOT happen!!! I understand how to set it all up with the equation and the formula (a,b,c) and I can solve it up to the last part when you have to simplify it. I cant simplify it. So as an example: as an answer I got and I simplified that to please help me! I have a test coming up and my teacher is certainly not the most understanding guy. Thanks again for considering my problem :)
Click here to see answer by scott8148(6628)

Question 591666: graph y=x^2
Click here to see answer by Alan3354(31518)

Question 591668: x^2-3x=28
Click here to see answer by nerdybill(7003)

Question 591991: how do i factor the trinomial -x^2 - 11X + 180
Click here to see answer by josmiceli(9817)

Question 592142: Approximate to three decimal places.
(a) sin 77°40'
Click here to see answer by Alan3354(31518)

Question 592356: what is the x coordinate of the vortex when y=-2x^+16x-30
Click here to see answer by solver91311(17077)

Question 592562: Which quadratic equation has roots 7 and -2/3?
Click here to see answer by solver91311(17077)

Question 592564: Identify the vertex, axis of symmetry, and direction of opening for y=-8(x+2)^2.
Click here to see answer by stanbon(57967)

Question 592560: Which quadratic equation has roots -2 and 1/5?
Click here to see answer by solver91311(17077)

Question 592734: the discriminate of the equation 7x^2+6x+2=0 is

Click here to see answer by jim_thompson5910(28715)

Question 593083: solve for zeros of the following quadratics by factoring
n^2+3n-12=6
Click here to see answer by nerdybill(7003)

Question 593092: solve for zeros of the following quadratics by factor
7r^14r+7=0
Click here to see answer by ankor@dixie-net.com(15746)

Question 593414: Hypotenuse:20 side a:12 side b? Perimeter? Of a right triangle
Click here to see answer by rfer(12730)

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7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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