Homework Help: Algebra

Posted by Maria1 on Thursday, April 26, 2012 at 11:49am.

f(x)=1-x^2.
Looking for the vertex and an equation of the line of symmetry.

f(x)=-x^2+5x+36 Looking for the x, and Y coordinates.

I seem to be entering the answers backwards, cannot understand.

Please help.

Algebra - Reiny, Thursday, April 26, 2012 at 12:26pm
shortcut to find vertex of
y = ax^2 + bx + c
the x of the vertex is -b/(2a)
in your case, the x of the vertex = 0/-2 = 0
sub back in
f(x) = 1
vertex is (0,1)
axis of symmetry is x = 0

2nd:

you must mean the x and y -intercepts
let y or f(x) = 0
x^2 - 5x - 36 = 0
(x-9)(x+4) = 0
x = 9 or x = -4

for y-intercept let x = 0
then y = f(0) = 36

Answer this Question

Related Questions

maths - how do i find out the the equation of the line of symmetry for f(x)=ax^2...
Algebra - I need a jump start in setting up the equations etc when solving for ...
Algebra 1 - s(x)=1/5x^2 Can anyone help me find the vertex of this equation and ...
Algebra - Find the vertex, the line of symmetry, the maximum or minimum of the ...
algebra - 1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. ...
Algebra II - Write an equation for a parabola that opens upward from its vertex ...
Algebra/%%$#!!! - F(x)=1/4 (x+7)^2+7 Looking for the vertex and the max or min ...
algebra 2 please check - Identify the line(s) of symmetry for the conic section ...
Algebra - find the vertex, line of symmetry, and minimum or maxium values of the...
math, algebra,graphs help - THe directions state: (A)Complete the table, (B) ...

For Further Reading

First Name:
School Subject:
Answer: