Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 457726: hard question
Find the quadratic equation that fits the following set of data points
{(-2,18),(-5,87),(4,42)} Write the equation in the stanrd form, y=ax^2+bx+c.
Thank you.
Click here to see answer by Edwin McCravy(20054)

Question 457714: Determine whether the graph of y=3x^2+2x− 10 opens up or down and whether it has a maximum or minimum point.
Click here to see answer by Edwin McCravy(20054)

Question 457781: I really don't understand this one:
Determine the nature of the solution of the equation
x^2-18x+81=0
Click here to see answer by Alan3354(69443)

Question 457779: I have another difficult problem
x^2/3-3x ^1/3-4=0
Click here to see answer by Alan3354(69443)

Question 457764: I have no idea how to work this problem, I keep getting the wrong answer
please help
Solve:
(y^2-5y)^2-8(y^2-5y)-84=0
Click here to see answer by scott8148(6628)

Question 457775: Can someone please help, I am totally lost
Find all x-intercepts of the given function f(x).
F(x)=x-17√(x+72)
Thank you.
Click here to see answer by ankor@dixie-net.com(22740)

Question 457921: 1. Something is wrong with the student�s work below.
� Explain what the student did wrong.
� Next, show how to simplify the fraction correctly.
Sara simplifies the expression as follows: x^2+6x+9/x+3
x^2 + 6x( X is crossed out with 1)+9( 9 is crossed out with 3/ x (crossed out for 1)+3( 3 crossed out for 1)=x^2+9( x does not eqaul -3)

Click here to see answer by richwmiller(17219)

Question 457938: 1. Something is wrong with the student�s work below.
� Explain what the student did wrong.
� Next, show how to simplify the fraction correctly.
Sara simplifies the expression as follows: x^2+6x+9/x+3
x^2 + 6x( X is crossed out with 1)+9( 9 is crossed out with 3/ x (crossed out for 1)+3( 3 crossed out for 1)=x^2+9( x does not eqaul -3)
Click here to see answer by richwmiller(17219)

Question 457942: given that the equation x^2+(2-h)x+h=0 has non-zero roots which differ by 2,find the value of
(a)each root
(b)h
Thanks~~
Click here to see answer by robertb(5830)

Question 457996: The equation 2(x^2+12)+kx=0
where k <0 has roots a and b where a-b=4.Find the value of k
Click here to see answer by J2R2R(94)

Question 457992: The equation x^2-9x+2k=0 has roots a and b.If a = 2b,find the value of k
Thanks~~
Click here to see answer by robertb(5830)

Question 458017: Please help I have two problems: find the vertex,line of symmetry and graph the function:
f(x)=-2x^2+2x+10
f(x)=2-x^2
Thank you
Gina
Click here to see answer by stanbon(75887)

Question 458034: Graph the Parabolas y=-2x^2+3x+2
Click here to see answer by poliphob3.14(115)

Question 458128: can someone please, please me
f(x) =(x^2-6x)^2-22(x^2-6x)-55
Thanks
Click here to see answer by richard1234(7193)

Question 458252: find the vertex, line of symmetry , and maximum or minimum value of the quadratic function: f(x)= 2x^2 - 8x + 22
Click here to see answer by Alan3354(69443)

Question 458252: find the vertex, line of symmetry , and maximum or minimum value of the quadratic function: f(x)= 2x^2 - 8x + 22
Click here to see answer by rfer(16322)

Question 458251: find the vertex, line of symmetry, and maximum or minimum value of the quadratic function: f(x)= -x^2 + 12x + 6
Click here to see answer by rfer(16322)

Question 458256: find the x-intercept and y-intercept: f(x)= -x^2 + 5x + 50
Click here to see answer by Alan3354(69443)

Question 458256: find the x-intercept and y-intercept: f(x)= -x^2 + 5x + 50
Click here to see answer by oberobic(2304)

Question 458254: find the vertex, line of symmetry, and maximum or minimum value of the quadratic function: f(x)= -2x^2 + 2x + 10
Click here to see answer by solver91311(24713)

Question 458307: Enter the quadratic equation in standard form. Use the caret (^) to enter exponents. For example, enter x2 as x^2.
2x2 - 12 + 2x = (x - 2)2 + 2
I have yet to learn how to do this..
Click here to see answer by rfer(16322)

Question 458352: Solve 4x^4+27x^2=7
Click here to see answer by robertb(5830)

Question 458365: Given that p and q are the roots of the quadratic equation 2x^2+2px=q^2,if p-q=6 find the value of pq,thanks~~
Click here to see answer by robertb(5830)

Question 458365: Given that p and q are the roots of the quadratic equation 2x^2+2px=q^2,if p-q=6 find the value of pq,thanks~~
Click here to see answer by josmiceli(19441)

Question 458756: I wasn't sure where to put this.
Consider only the discriminant, b^2-4ac, to determine whether one real-number solutions, or two different imaginary-number solutions exist.
x^2+3x+7=0
thanks for the help.
Click here to see answer by math-vortex(648)

Question 458800: Find the dimensions of a rectangle if its area is 72m squared and it's perimeter is 34m
Click here to see answer by amoresroy(361)

Question 458801: The sides of a right-angled triangle are 4x, 2x-2, 2x+7.
Find it's perimeter.
Click here to see answer by amoresroy(361)

Question 458927: 1. Something is wrong with the student�s work below.
Explain what the student did wrong.
Next, show how to simplify the fraction correctly.
The problem : x^2+6x+9 / x+3
Sara simplifies the expression as follows:
x^2+6(x is crossed out and replaced with ^1)+(9 is crossed out and replaced with 3) / (x is replaced with 1)+(3 is replaced with 1). It should look like this, x^2+6^1+3 / 1+1 = x^2+9, (x=-3)
Explain what the student did wrong.
Next, show how to simplify the fraction correctly.

Click here to see answer by richwmiller(17219)

Question 458849: Write a quadratic equation with -3/4 and 4 as its roots. Wite the equation in form ax^2 + bx + c = 0, where a,b and c are intergers.
Click here to see answer by ankor@dixie-net.com(22740)

Question 458970: Hi everyone
My problem is:
Give exact and approximate solutions to three decimal places
x^2+6x+9=25
Thanks you
Gina
Click here to see answer by ankor@dixie-net.com(22740)

Question 459135: In order to complete the square, what quantity should be added to both sides of the equation: x^2-14x=5
Click here to see answer by nerdybill(7384)

Question 459133: 4x^2-8x+2=0 need help with quadratic formula
Click here to see answer by rwm(914)

Question 459273: Solve using the quadratic equation:
X^2-4x-13=0
I have completed the calculation and was fairly confident of my solution, but it is wrong according to the answer key.
Click here to see answer by Gogonati(855)

Question 459277: I have one more problem to solve
Find the Vertex
f(x)=5-x^2
Thank you,
Gina
Click here to see answer by Gogonati(855)

Question 459254: Hi everyone,
Please help me on this problem.
Find the vertex, line of symmetry, is maximum or minimum and graph the function
f(x)=1/3(x+2)^2+1
Thank you so much
Gina
Click here to see answer by Gogonati(855)

Question 459299: 5RE_62.
The pages of a book measure 15cm by 20cm. Margins of equal width surround the printing on each page and constitute one half of the area of the page. Find the width of the margins.
Click here to see answer by studyden(2)

Question 459276: Hi,
Please help
write a quadratic equation with the solutions -10 and -1
Thank you
Gina
Click here to see answer by sudhanshu_kmr(1152)

Question 459655: Loren drove 200 miles at a certain rate, and his wife, Lois, drove 100 miles at a rate 10 mph slower. If Loren had driven for the entire trip, they would have arrived 30 minutes sooner. What was Loren's rate?
Click here to see answer by richwmiller(17219)

Question 459676: find the value of x to 3 d.p when:
x^2 + 20x = 400cm^2
Click here to see answer by Alan3354(69443)

Question 459792: 1.Find the value of "c" that makes the trinomial a perfect square: X^2-8x+c

Click here to see answer by richwmiller(17219)

Question 459791:
5.Find the value of "c" that makes trinomial a perfect square: x^2-8x+c

Click here to see answer by richwmiller(17219)

Question 459788: The sum of the length of the base and height of a triangle is 24 cm. If the Area of the triangle is 54 square cm, find the base and height
Click here to see answer by Gogonati(855)

Question 459813: What is the width of a uniform expansion needed all around to double the area of a 10cm by 15cm rectangle
Click here to see answer by mananth(16946)

Question 459845: The area of the front cover of a daily journal is 273cm squared, and the length is 8cm greater than the width. What are the dimensions of the cover?
Click here to see answer by emargo19(101)

Question 459867: I'm having trouble solving the following:
x3 + 2x2 - x - 2 = 0.
and
sqrt(1-3x)-1 = x
Click here to see answer by richwmiller(17219)

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