Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 29987: what is the period of the graph y = 2sin 3A.
what is the period of function of y = sin x/4.
what is the domain function of y = tan x.
Click here to see answer by stanbon(75887)

Question 33878: 3x^4=48x^2
Click here to see answer by kietra(57)

Question 33880: x^3-3x^2+3x-9=0
answer can also include complex numbers
Click here to see answer by stanbon(75887)

Question 33880: x^3-3x^2+3x-9=0
answer can also include complex numbers
Click here to see answer by Nate(3500)

Question 33877: sqrt(2x-5)-sqrt(x-3)=1
Click here to see answer by fz_shurtugal(3)

Question 33899: Can you help me solve (((3x^4-28x^2+9=0)))
Click here to see answer by stanbon(75887)

Question 34056: Can you help me solve
A car travels 180 mi. A second car, traveling 15 mi/hr faster than the first car, makes the same trip in 1 h less time. find the speed of each car.
Click here to see answer by tmarienatree(17)

Question 34173: I need help with the following 2 questions...
1. Solve by extracing square roots: 3x^2-80=0
I figured this was it, can you check the work?
3x^2 - 80 = 0
3x^2 = 80
3x^2/3 = 80/3
x^2 = 80/3
sq root of x^2 = sq root of 80/3
Answer - x=sq root of (= or -)80/3?? Does the (+ or -) have to be there?
2. Solve by extracting square roots: (2x-2)^2 = 9
sq root of (2x-2)^2 = sq root of 9
2x-2 = (+ or -)3
This is where I am confused... is the next step dividing it all by 2, or taking the -2 to the other side of the problem? Could you please help me get though this one?
Thanks!

Click here to see answer by Cintchr(481)

Question 34172: I need help with the following 2 questions...
1. Solve by extracing square roots: 3x^2-80=0
I figured this was it, can you check the work?
3x^2 - 80 = 0
3x^2 = 80
3x^2/3 = 80/3
x^2 = 80/3
sq root of x^2 = sq root of 80/3
Answer - x=sq root of (= or -)80/3?? Does the (+ or -) have to be there?
2. Solve by extracting square roots: (2x-2)^2 = 9
sq root of (2x-2)^2 = sq root of 9
2x-2 = (+ or -)3
This is where I am confused... is the next step dividing it all by 2, or taking the -2 to the other side of the problem? Could you please help me get though this one?

Click here to see answer by Cintchr(481)

Question 34177: solve by factoring

isn't the answer = x- 9 ?
Click here to see answer by elephantsize(7)

Question 34161: x� + 6x � 3 = 0

Click here to see answer by longjonsilver(2297)

Question 34340: Can you help me simplify?
(3x-1)/(x^2+5x-6)-((2x-7)/(x^2+5x-6)
Click here to see answer by longjonsilver(2297)

Question 34328: Hello there> Can you help me solve this question that I am having trouble with?????? 4 over m squared-7=1???? PPLLEEAASSEE!! I also need to isolate for "t" m=16tsquared+vt+7
Click here to see answer by longjonsilver(2297)

Question 34346: Help me solve....please!!!
X^2/x+1+2=1/x+1
Click here to see answer by ichudov(507)

Question 34347: I need to simplify, can you help?
(3x+9)/(x^2-x-12 * (x^2+5x+6)/(24x+48)
Click here to see answer by ichudov(507)

Question 34352: (x^2+2x-15)/(6-2x) can you help simplify. I got -x-5/2
Click here to see answer by ichudov(507)

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(75887)

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)� = 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(75887)

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(75887)

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(75887)

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)

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