SOLUTION: Express the quadratic function in standard form f(x) = -x^2+4x must find the vertex, x-intercept and y-intercept Please help!

Click here to see ALL problems on Functions

Question 948124: Express the quadratic function in standard form
f(x) = -x^2+4x
must find the vertex, x-intercept and y-intercept
Please help!

Found 2 solutions by josgarithmetic, lwsshak3:
Answer by josgarithmetic(39618) (Show Source):
You can put this solution on YOUR website!
Sufficiently responded in http://www.algebra.com/algebra/homework/equations/Equations.faq.question.948099.html

Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website!
Express the quadratic function in standard form
f(x) = -x^2+4x
must find the vertex, x-intercept and y-intercept
***
y=-x^2+4x
complete the square:
y=-(x^2-4x+4)+4
y=-(x-2)^2+4
This is an equation of a parabola that opens down:
vertex: (2,4)
y-intercept: (0,0)
x-intercepts: 0, 4