Question

The function f is defined by f(x)=-x2+2x-7. What is the value of f(-3)?

A. -22

B. -10

C. -7

D. -4

E. 8

Answer 1

Option A
`f(-3)=-22`

Explanation:

we have

`f(x)=-x^(2)+2x-7`

we know that

f(-3) is the value of f(x) when the value of x is equal to -3

so

For x=-3

substitute the value of x=-3 in the equation

`f(-3)=-(-3)^(2)+2(-3)-7`

`f(-3)=-9-6-7`

`f(-3)=-22`