Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 34352: (x^2+2x-15)/(6-2x) can you help simplify. I got -x-5/2
Click here to see answer by ichudov(499)

Question 34352: (x^2+2x-15)/(6-2x) can you help simplify. I got -x-5/2
Click here to see answer by venugopalramana(3286)

Question 34339: Can you show me how to simplify this problem?
3x+9/x^2-x-12 * x^2+5x+6/24x+48
Click here to see answer by venugopalramana(3286)

Question 34405: I dont understand how to get the answer could you PLEAZZZ explain it:
-x(to the second)-4x=3
-x(to the second)+14x=48
2x(to the second)+7x=-3
3x(to the second)-5=-14x
(pg 806)
Click here to see answer by checkley71(8403)

Question 33912: x^3-3x^2+3x-9=0
I got x=3; x=3i; x=-3i...how do I plug answers back in to check solution?
Click here to see answer by venugopalramana(3286)

Question 34498: x^2+x+5=0
Click here to see answer by lyra(94)

Question 34500: (2m-7)^2-8(2m-7)+12=0
Click here to see answer by lyra(94)

Question 34499: the square root of 18y+9 =y+5
Click here to see answer by stanbon(57323)

Question 34499: the square root of 18y+9 =y+5
Click here to see answer by Prithwis(166)

Question 34475: Solve by completing the square:
w^2 - 2w- 15 = 0

Solve
x^2 + 2x - 8 < or = to 0
Click here to see answer by checkley71(8403)

Question 34504: 5n^2=-12n-1
Click here to see answer by Cintchr(481)

Question 34497: All solutions are real numbers
5n^2=-12n-1
Click here to see answer by Cintchr(481)

Question 34271: (x - 3/2)² = 7/4
Click here to see answer by Cintchr(481)

Question 34537: Solve by completing the square:
w^2-2w-15=0

Click here to see answer by lyra(94)

Question 34600: Consider the parabola: y=x^2-6x+5.
(i) Complete the square.
(ii) Give the Vertex.
(iii) Give the x- and y-intercepts.
(iv) Graph the parabola.
I have been working on this one but cannot get it right. Please help.
Click here to see answer by stanbon(57323)

Question 34636: I need help on this one! Please!!! Use the quadratic formula to solve
2x^2+x-5=0
Click here to see answer by askmemath(368)

Question 34652: Can you please help me solve this? Please use the quadratic formula. 2x^2+x-5=0
Click here to see answer by stanbon(57323)

Question 34656: Hi, I really need some help!
Write a quadratic equation with -7 and 5 as its roots.
Thank You!!!
Click here to see answer by stanbon(57323)

Question 34598: Solve using the quadratic formula. Show all the steps,otherwise no credit: 2x2 -8x -3 = 0. Please help me with this problem. I have no idea how to do it. Thank you.
Click here to see answer by checkley71(8403)

Question 34724: for the pair of functions defined, find f+g, f-g, fg, and f/g. give the domain of each. probelm; f(x)=6-3x,g(x)=-4+1... Thanks so much!
Click here to see answer by longjonsilver(2297)

Question 34766: I am trying to work out a problem and I am not sure how to work it. The problem was given to my class out of the book for extra credit.
The problem is: 2x2-x-21.
It is 2xsquared subtract x subtract 21
Thank You
Brittany Miller
Click here to see answer by checkley71(8403)

Question 34878: 2y squared + 2=9y
Click here to see answer by checkley71(8403)

Question 34885: I have to solve each equation and check my solutions. The teacher never showed us how to do the ones where the number after the = was not zero. Here is the proble... xsquared + 24 minus 5x
Click here to see answer by checkley71(8403)

Question 34925: I have to solve each problem then check my answer to be sure it is reasonable. Here's the problem:
A ten-gallon aquarium holding African cichlids is 3 inches higher than it is wide. It's length is 21 inches, and its volume is 2730 cubic inches. What are the height and width of the aquarium?
I have set it up to look like this:
(x-7)~2 + (x+1)~2 + x~2 then I have gotten that figured out to x~2-14x+49+x~2+2x+1=x~2 that is where I get stuck after subtracting the x~2 to get it on the same side as the rest of the equation.
Click here to see answer by mbarugel(146)

Question 35039: The number of people n in the mall is modeled by the formula: n=-100x(sq)+1200x where x is the number of hours since the mall oopened this morning. If the mall opened at 9 am, when were there 2000 or more people in the mall?
Click here to see answer by hydromojo(20)

Question 35154: Please provide the lowest possible factors for the following:
21z^3+28z
Click here to see answer by checkley71(8403)

Question 35203: how did you reduce negative b pluse or minus the square root of 76 divided by -2 in to negative 4 plus or minus the square root of 19
HOW
Click here to see answer by longjonsilver(2297)

Question 35188: given: f(x)=x^2-6x+5
1) write f(x) in standard form
2) find the vertex and x-intercepts of f(x)
3) solve f(x)

Click here to see answer by Nate(3500)

Question 35398: Need help fast...Please someone show me how to do this.
Solve X in (x-2)(x+5)=0
also
Solve Y in 16(y-3)^2=64
and
Solve Y in y^2+2y-3=0
I am so confused...
Thanks
Click here to see answer by lyra(94)

Question 35453: In the planning stages of the renovation of an 1800-square-foot space, the amount of office space allocated per person is increased by 25 square feet when 6 people are removed to an adjoining building. How many people share this renovated space after the move?
How much space does each person have?
1800/x + 25 = 1800/x – 6
Click here to see answer by Paul(988)

Question 35551: solve by using the quadratic formula
9x^2-270=0
Click here to see answer by Cintchr(481)

Question 35559: Find the dimensions of the square picture that make the area of the picture equal to 75%of the total area enclosed by the frame. the toatl are of the frame is 144in please can u help me
Click here to see answer by venugopalramana(3286)

Question 35563: Find the radius of a sphere with surface area 160in squared. use the formula A=4(pi)(r)squared where A is the surface area and r is the radius of the sphere.
Click here to see answer by Earlsdon(6287)

Question 35591: What is the Axis of Symmetry?
Click here to see answer by Nate(3500)

Question 35594: What is the factored form of the quadratic equation "x^2+x-12=0".I also was wondering if you could show me how to work it out or understand how to solve this problem.
Thanks,
Jenae
Click here to see answer by Nate(3500)

Question 35598: I'm solving quadratic equations.How do I solve the equation "c^2+12c+20=0"?
Thanks,
Jenae
Click here to see answer by stanbon(57323)

Question 35598: I'm solving quadratic equations.How do I solve the equation "c^2+12c+20=0"?
Thanks,
Jenae
Click here to see answer by Nate(3500)

Question 35606: Totally lost. Thanks for any help.
2) For the function y = x2 - 6x + 8, perform the following tasks:
a) Put the function in the form y = a(x - h)2 + k.
Answer:
Show work in this space.

b) What is the line of symmetry?
Answer:

c) Graph the function using the equation in part a. Explain why it is not necessary to plot points to graph when using y = a (x - h) 2 + k.
Show graph here.

Explanation of graphing.

d) In your own words, describe how this graph compares the graph of y = x2?
Answer:

Click here to see answer by rapaljer(4667)

Question 35607: Again please help.
4) Amanda has 400 feet of lumber to frame a rectangular patio (the perimeter of a rectangle is 2 times length plus 2 times width). She wants to maximize the area of her patio (area of a rectangle is length times width). What should the dimensions of the patio be, and show how the maximum area of the patio is calculated from the algebraic equation.
Answer:
Show work in this space.

Click here to see answer by Paul(988)

Question 35605: Please help. I do not understand how to do this.

1) Using the quadratic equation x2 - 3x + 2 = 0, perform the following tasks:
a) Solve by factoring.
Answer:
Show work in this space.

b) Solve by completing the square.
Show work in this space.

c) Solve by using the quadratic formula.
Show work in this space.
Click here to see answer by elima(1433)

Question 35679: A ball is thrown into the air with the velocity of 48 feet per second.
With h for height and t for time and height determined with h=16tsquared+48t=4.
How may seconds will the ball reach maximum height.
What is the maximum height.
Click here to see answer by rapaljer(4667)

Question 35688: Question 35679:
A ball is thrown into the air with the velocity of 48 feet per second.
With h for height and t for time and height determined with h=16tsquared+48t+4.
How may seconds will the ball reach maximum height.
What is the maximum height.

Click here to see answer by rapaljer(4667)

Question 35711: the distance,d that an oject will fall in a time of t seconds can be approximated by the formula d=5t squared. how long will it take an oject to fall 180m
Click here to see answer by Nate(3500)

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