Question

Find f(−2)given f(x)=−2x3−x2+7
A. 15
B. 17
C. 19
D. -13
HELP PLEASE

Answer 1

`\huge\boxed{\sf f(-2)=19}`

Explanation:

Given function:

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

Put x = -2

`f(-2)=-2(-2)^3-(-2)^2+7\\\\f(-2)=-2(-8)-4+7\\\\f(-2)=16-4+7\\\\f(-2)= 12+7\\\\f(-2)=19\\\\\rule[225]{225}{2}`