Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 554583: solve for the positive value of x: 6x^2-54=0
Click here to see answer by jim_thompson5910(35256)

Question 555067: a certain number is added to the square of the number results in 8.75.what is the number?

Click here to see answer by edjones(8007)

Question 555084: x2+35x-150=0
Click here to see answer by josmiceli(19441)

Question 555153: Okay I started an internet college algebra class, and I'm kicking myself for it! My website will not allow me to watch clips on solving problems... so I need help on figuring this problem due to I have 5 more just like it. Any help would be appreciated.
Here's my problem:
x=3 and Y=-2
[X]+[Y]=?
If someone could tell me what kind of math problem is called it would be appreciated!!!

Click here to see answer by nerdybill(7384)

Question 555180: How can i find the vertex of

Y=(x-4)^2 +5
Click here to see answer by jim_thompson5910(35256)

Question 555324: how do you solve 6x^2-11x-35=0
Click here to see answer by jim_thompson5910(35256)

Question 555479: solve:
x^2-x-40=2
Click here to see answer by jim_thompson5910(35256)

Question 555500: How can i find the y-intercept using x=0 in the quadratic y= 2x^-5x-3? do I use the formula -b/2a to find the vertex for x or y=ax^2+bx+c or both? I need very clear instructions for this because i simply don't understand, sorry.
Click here to see answer by Earlsdon(6294)

Question 555790: Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.)
x2 - 5x + 5 = 0
X=
x=
Click here to see answer by jim_thompson5910(35256)

Question 555974: I am trying to solve for x^2 +12x � 64 = 0 I have to use the Indian Method and I am having a difficult time because I have to show all of my work for the seven steps.
Click here to see answer by KMST(5328)

Question 555970: I am trying to solve the equation for x^2 � 2x � 13 = 0 I have to use the Indian Method and I am having a difficult time because I have to show all of my work for the seven steps.
Click here to see answer by KMST(5328)

Question 556161:
Find a quadratic model for each set of values.

(-1, 1), (1, 1), (3, 9)

Click here to see answer by KMST(5328)

Question 556117: Please help! Find and label the vertex and line of symmetry. graph the function.
f(x)= -1/5x^2
I got (0,0) and the line of symmetry is 0. Am I right?
Click here to see answer by ankor@dixie-net.com(22740)

Question 556361: Help please! Find and label the vertex and line of symmetry. graph the function.
f(x)= -1/5x^2
I got (0,0) and the line of symmetry is 0. Am I right?
Click here to see answer by jim_thompson5910(35256)

Question 556451: A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = �16t� + 148t + 30. How long does it take the boulder to reach its maximum height? What is the boulder�s maximum height? Round to the nearest hundredth, if necessary
Click here to see answer by nerdybill(7384)

Question 556467: Please Help! Find the vertex, line of symmetry, the maximum/minimum value of the quadratic function.
f(x)= -2x^2+2x+10
I got x= 1/2
y= 21/2
the line of symmetry is x= 1/2
the maximum/minimum of f(x)is 21/2
the value. f(1/2)=(21/2)is the maximum
Did I do this right?
Click here to see answer by jim_thompson5910(35256)

Question 556472: Determain the nature of the solutions.
x^2+18=0
A. 1 real solution
B. 2 imaginary solutions
C. 2 real solutions
I got B. Am I right?
Click here to see answer by jim_thompson5910(35256)

Question 556504: f(x)= -4x^2-8x+3
is this a minmum or a maximum
what is the value
Click here to see answer by prateekagrawal(56)

Question 556843: Solve for x.
x^2+32=8x
I got (8+8i/2 , 8-8i/2)
Am I on the right track?
Thank you

Click here to see answer by stanbon(75887)

Question 556842: Find the x- and y-intercepts.
F(x)25x+10x+1
I got..
y-intercept is (0,1)
x-intercept is ((-1/5,0)
Am I correct?

Click here to see answer by stanbon(75887)

Question 556841: #20
Solve the formula for the given variables. Assume all variable represent non negative numbers.
A=2s^2, for s
I got s= √A/2
Am I right?

Click here to see answer by stanbon(75887)

Question 557052: Please, I need help with the following, ASAP :/

*Solve by the quadratic formula. Simplify answers.
1. x^2-3X-1=0
2. 4X^2+x-1=0
3. 6x^2 -2X-1 =0
Thanks!!

Click here to see answer by richard1234(7193)

Question 557167: Determine the abscissae of the maxima, minima and inflection points.
y = x^4 + 6x^3 - 5
The answer is supposed to be: Minimum at x point = -9/2, inflection points at x=0 and x=-3
Help me please.
Click here to see answer by Alan3354(69443)

Question 557164: Determine the coordinates of a relative maximum of this function if any.
f(x) = x^3 - 3x^2 - 9x - 7
Help me please.
Click here to see answer by Alan3354(69443)

Question 557214: Find two numbers whose sum is 36 and whose product is a maximum
Click here to see answer by josmiceli(19441)

Question 557288: Please help me solve the inequality for w+4<-2
Click here to see answer by bluemockingjay7(41)

Question 557458: Mathematicians have been searching for a formula that yields prime numbers. One such formula was x^2-x+41. Select some numbers for x, substitute them in the formula, and see if prime numbers occur. Try to find a number for x that when substituted in the formula yields a composite number.
I'm not sure of the steps to complete this problem...Please explain.
Click here to see answer by KMST(5328)

Question 557658: For the function y = f (x) Next 3x^4 - 6x^2, determine if the graph has minima or maxima and, where appropriate, specify the coordinates of these points. Use the first derivative test and the second derivative test.

Click here to see answer by solver91311(24713)

Question 557914: What is the the discriminant of 12x^2-x-6=0? I tried working it out and got an a long decimal which rounded to 2, found the square root, i then added (1/6),and divided it by 2, however when i stored x in my calc to check it it didnt = 0, so i know i did something wrong. I think i went wrong with the discriminant but i could have messed up somewhere else. if there is anyway you could show mw how to work it i would be very appreciative!!!
Click here to see answer by scott8148(6628)

Question 557924: Where does the -16 come from in the vertical motion equation?
Click here to see answer by Alan3354(69443)

Question 557922: Where does the -16 come from in the vertical motion formula?
Click here to see answer by richard1234(7193)

Question 558089: how do you solve 3=2x^2=5x
Click here to see answer by KMST(5328)

Question 557998: How can i find all the positive integers "n" so that
2^17 + 17 * 2^12 + 2^n is a perfect square?

Click here to see answer by richard1234(7193)

Question 558158: susan drops her camera in the river from a bridge that is 400 feet high. How long is it before she hears the splash?
Click here to see answer by Earlsdon(6294)

Question 558265: 1/2x-2/3>2
Click here to see answer by unlockmath(1688)

Question 558358: Please help.
use the quadratic formula to solve the equation.x^2-x=-5
I got:
x=1+i√19/2 , 1-i√19/2
Am I correct?
Click here to see answer by rfer(16322)

Question 558358: Please help.
use the quadratic formula to solve the equation.x^2-x=-5
I got:
x=1+i√19/2 , 1-i√19/2
Am I correct?
Click here to see answer by Alan3354(69443)

Question 558420: Please help!
find all the numbers for which the rational expression is undefined.
(s^3-6s)/(s^2-81)
Click here to see answer by solver91311(24713)

Question 558424: I am reviewing for a test and I think I got the first 3 right. Can anybody check my answers? Also, I am having trouble on number 4. Thanks!!!
1. Solve. (x+18)(x-13)(x+16)>0
I got �-18 < x < -16 or x>13
Am I right?
2.Multiply. (2√3-6√6)(5√3+15√6)
I got -510
Am I correct?
3. use the quadratic formula to solve the equation.x^2-x=-5
I got: x=1+i√19/2, 1-i√19/2
Am I correct?

4. find all the numbers for which the rational expression is undefined.
(s^3-6s)/(s^2-81)

Click here to see answer by Alan3354(69443)

Question 558372: Help!!
Solve.
(x+18)(x-13)(x+16)>0
I got
-1813
Am I right?
Click here to see answer by KMST(5328)

Question 558703: Solve the equation by completing the square
x^2 + 6x − 12 = 0
Click here to see answer by richard1234(7193)

Question 558701: Solve the equation by factoring
6x(x − 1) = 7 − 25x
Click here to see answer by mananth(16946)

Question 558707: what is the square root of 169
Click here to see answer by mananth(16946)

Question 558776: My example for the class to solve with an exact answer.
x^2 + 2x - 8
Click here to see answer by kkasko(46)

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