Question

Given f(x) = -x² - 10x - 9, find f(-1)

Answer 1

0

Explanation:

Given

f ( x ) = - x² - 10x - 9

To find : f ( - 1 )

x = 1

f ( 1 ) = - ( - 1 )² - 10 ( - 1 ) - 9

= - 1 + 10 - 9

= 10 - 9 - 1

= 10 - 10

f ( 1 ) = 0

Answer 2

f(-1) = -1 + 10 - 9 = 0