Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 481771: Can someone please help me factorise the following
1) 18x^2-96x+128
2) 45y^4z-80y^2z^3
3) x^4+5x^3-7x^2-5x+6 given(x^2-1) is a factor.
Thank you very much
Click here to see answer by Vivek g(3)

Question 481782: hi i need some help. here is the qns
Find the values of k for which the quadratic equation 9x^2-kx+(k-7)=0 has
(i) one positive and one negative root
(ii) one root twice the value of the other
Click here to see answer by mathstutor494(120)

Question 481964: If the two solutions of the quadratic equation 4x^2+4x+k=0 are equal, find k
I would greatly appreciate the help. Thank you
Click here to see answer by jim_thompson5910(35256)

Question 481964: If the two solutions of the quadratic equation 4x^2+4x+k=0 are equal, find k
I would greatly appreciate the help. Thank you
Click here to see answer by stanbon(75887)

Question 481966: if the roots of a quadratic equation are -3/2 and 4/5 find one possible equation.
Please help
Click here to see answer by jim_thompson5910(35256)

Question 481966: if the roots of a quadratic equation are -3/2 and 4/5 find one possible equation.
Please help
Click here to see answer by solver91311(24713)

Question 482033: I am not sure how to start this to figure out the last day of tickets.
Use the quadratic equation to determine the last day that tickets will be sold. Write your answer in terms of the number of days after ticket sales begin. (x=1 is the day tickets go on sale).

Tickets=-0.4x^2+9x+11
Click here to see answer by jorel1380(3719)

Question 482315: Can a quadratic equation solution be determined by looking at a graph, and how?
Click here to see answer by ankor@dixie-net.com(22740)

Question 482438: Solve Navigation. The current in a typical Mississippi River shipping route flows at a rate of 4 mph. In order for a barge to travel 24 mi upriver and then return in a total of 5 hr, approximately how fast must the barge be able to travel in still water?
Click here to see answer by ankor@dixie-net.com(22740)

Question 482516: what is x in the equation 3x squared + 2x =0
Click here to see answer by LagrangeSon678(5)

Question 482967: 8x^2+10x-7

Click here to see answer by Student3354(13)

Question 483110: what is x?
-2/10x + 2/5(x - 2)= -1
Click here to see answer by rfer(16322)

Question 483204: y^2+6y+34=0 solve by "completing the square"
Click here to see answer by stanbon(75887)

Question 483199: (x+5)(x+3)=3 solve by using quadratic formula
Click here to see answer by mananth(16946)

Question 483284: A chain store manager has been told by the main office that daily profit, P, is related to the number of clerks working that day, x, according to the equation P = -25x2 + 500x. What number of clerks will maximize the profit?
Click here to see answer by mathstutor494(120)

Question 483378: I have tried to solve this equation using the quadratic formula but I end up with 4 sqrt 8 / 2 instead of 2 / sqrt 2 . the equation is x^2 - 4x + 2 = 0
Click here to see answer by jorel1380(3719)

Question 483300: Quadratic equations, which are expressed in the form of ax2 + bx + c = 0, where a does not equal 0, may have how many solutions? Explain why?
Think of a linear equation. How many solutions may that have?
Can you extend this to a an n-degree equation?

Click here to see answer by richard1234(7193)

Question 483542: i have no idea where to go on this problem please help
"joe said, if five times my age in 8 years is subtracted from the square of my present age, the result is 86." find joe's age
Click here to see answer by Learners04(5)

Question 482758: -10 and -7
The Quadratic Equation is ?= 0
Click here to see answer by bucky(2189)

Question 483746: I am very confused on how to interpret the equation I figured out
(48/n+3)(n-2), I have to rewrite this euation in a standard form of a quadratic equation. May I get help please. Thank you.
Click here to see answer by Alan3354(69443)

Question 483887: Sketch the graphs of Y=(2.4)(to power x) and Y=(2.4)(to power -x),on the same axes and label them properly.
Click here to see answer by Alan3354(69443)

Question 483887: Sketch the graphs of Y=(2.4)(to power x) and Y=(2.4)(to power -x),on the same axes and label them properly.
Click here to see answer by stanbon(75887)

Question 483853: How to sketch the graphs of (i) y=(x+1)cute and (ii) y=-(x-1)cute +4
Click here to see answer by Alan3354(69443)

Question 483880: How let the supply function be P=Q(squared)-0.5 and the demand function be P=Q(squared)+4. (i)Algebraically,find the economically equilibrium price and quantity. (ii)Sketch the graphs on the same axes.
Click here to see answer by stanbon(75887)

Question 483932: X+2Y=9
-X+6Y=7
Click here to see answer by Alan3354(69443)

Question 483931: 6x+8y=22
-5X+Y=20
Click here to see answer by Alan3354(69443)

Question 483931: 6x+8y=22
-5X+Y=20
Click here to see answer by Tatiana_Stebko(1539)

Question 484167: HSuppose an astronaut on the Moon throws a baseball upward. The astronaut lets go of the ball 2 meters above the ground with an initial velocity of 10 meters per second. How long does it take for the ball to hit the ground (H=0)? (Use the quadratic formula to solve this problem, show all work). Write a statement to interpret your results. How much longer will the ball stay in the air on the moon than the similarly-thrown baseball on Earth? Demonstrate this mathematically and with a sentence.
Click here to see answer by chessace(471)

Question 484547: Simplify this expression. (b+4)^2 divided by b^2+7b+12 I don't know what to do with the bottom part. I believe the top would be (b+4)(b+4) but not sure of the rest.
Click here to see answer by jorel1380(3719)

Question 484550: Solve x� + 4x � 7 = 0 by completing the square. How many solutions are there?

Click here to see answer by jorel1380(3719)

Question 484779: how to find the sum and products of the roots of roots of quadratic expression?
Click here to see answer by Alan3354(69443)

Question 484912: Factor completely using an appropriate factoring method.
y^3 + 2y^2 - 81y - 162
Click here to see answer by jim_thompson5910(35256)

Question 485481: Hi, I am really stuck on this one! Can someone please help? I need to solve this by completing the square;
4x^2 - 3x + 1
PLEASE help and explain your steps???

Click here to see answer by Theo(13342)

Question 485883: x^2-8x+9=0 solve by "completing the square"
Click here to see answer by richard1234(7193)

Question 485657: Is this expression simplified correctly? 3a/3a=0 Explain in complete sentences why or why not.
Click here to see answer by richard1234(7193)

Question 485882: x^2-7x+11=0 solve by using quadratic formula
Click here to see answer by jim_thompson5910(35256)

Question 485920: what is the answer in quadratic factoring if the problem is 3xsquared + 32x + 48

Click here to see answer by Edwin McCravy(20054)

Question 485946: find the value of k for which the line y=x+k is a tangent to the curve y to the power of 2=5x+10.
Click here to see answer by Edwin McCravy(20054)

Question 485970: 6x^3-11x^2-10x=0
Click here to see answer by htmentor(1343)

Question 486051: x^2+4x+8=0 solve by using quadratic formula
Click here to see answer by Edwin McCravy(20054)

Question 486050: y^2+6y+10=0 solve by completing the square
Click here to see answer by nerdybill(7384)

Question 486050: y^2+6y+10=0 solve by completing the square
Click here to see answer by MathTherapy(10549)

Question 486498: 1/4x+10=2
Click here to see answer by Tatiana_Stebko(1539)

Question 486429: If 2006x^2+2005x-2004=6x^2+52-4, what is the value of x^2+x
Options
A -1 B 0 C 1 D 2000
Click here to see answer by Tatiana_Stebko(1539)

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