Question 906410: A quadratic function is given.
f(x) = −x^2 + 18x
(a) Express the quadratic function in standard form.
f(x) = ____
(b) Find its vertex and its x- and y-intercept(s). (If an answer does not exist, enter DNE.)
vertex...............(x, y) = ( _ , _ )
x-intercepts......(x, y) = ( _ , _ ) (smaller value)
.........................(x, y) = ( _ , _ ) (larger value)
y-intercept........(x, y) = ( _ , _ )
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website! f(x) = 
(a) Express the quadratic function in standard form.
 where  and  are vertex coordinates
 .....complete the square
so, and 
(b) Find its vertex and its x- and y-intercept(s). (If an answer does not exist, enter DNE.)
vertex...............(x, y) = ( 9 , 81 )
x-intercepts......(x, y) = ( 0 , 0) (smaller value)
.........................(x, y) =( 18 , 0 ) (larger value)
y-intercept........(x, y) = ( 0 , 0)
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