First rewrite the quadratic function in standard form by completing the square, then find any x-intercepts and any y-intercepts.
-$$f ( x ) = - x ^ { 2 } + 17 x - 72$$
A) $x$-intercepts: 8 and $- 9 ; y$-intercept: 17
B) $x$-intercepts: $- 8$ and $- 9 ; y$-intercept: 72
C) $x$-intercepts: 8 and $9 ; y$-intercept: $- 72$
D) No x-intercepts; y-intercept: $- 72$

Question

Quizplus · Accepted Answer

The quadratic function can be rewritten in standard form by completing the square, and solving for x-intercepts gives 8 and 9. The y-intercept is found by evaluating the function at x = 0, which is -72.

First Rewrite the Quadratic Function in Standard Form by Completing f(x)=−x2+17x−72f ( x ) = - x ^ { 2 } + 17 x - 72f(x)=−x2+17x−72

First Rewrite the Quadratic Function in Standard Form by Completing $f ( x ) = - x ^ { 2 } + 17 x - 72$