Answer:
The simplified answer to the given equation is -54.
Explanation:
For this problem, we are given the value of x.
x = -2
So, let's plug in this value into our expression soit can be easier to solve.
5(-2)³ - 21 + 7
First, simplify the exponents.
5(-8) - 21 + 7
Now, multiply 5 by -8.
-40 - 21 + 7
Subtract -40 from 21.
-61 + 7
Add 7 to -61.
-54