Question

Given f(x) = -x² - 7x, find f(-10)

Answer 1

- 30

Explanation:

Given

f (x) = - x² - 7x

To find : f (- 10)

- x²

= - (- 10)²

= - [ (- 10)×(- 10) ]

= - [ 100 ]

= - 100

- 7x

= - 7 × - 10

= 70

f (- 10) = - 100 + 70

f (- 10) = - 30