Question

Evaluate the expression for the given value of the variable -4b-8 + -1 b^2 + 2b^3 ; b= -2

Answer 1

Answer:

$-12$

Step-by-step explanation:

We have been given an expression $-4b-8+(-1b)^2+2b^3$. We are asked to evaluate our given expression at $b=-2$.

To evaluate our given expression, we will substitute $b=-2$ in given expression.

$-4(-2)-8+(-1*-2)^2+2(-2)^3$

$8-8+2^2+2(-8)$

$0+4-16$

$-12$

Therefore, the value of our given expression is $-12$.

Answer 2

-4b-8 + -1b^2 +2b^3
-4(-2)-8+-1(-2)^2+2(-2)^3
8-8+2^2-4^3
4-64
60