Question

Evaluate 4(3x) - 8- x2 for the following values of x.
a. X =3
b. X = -3

Answer 1

A = 22
4(3x)-8-x2 = 4(3x3)-8-3x2= 22
B= -38
4(3x)-8-x2 = 4(3x-3)-8-(-3x2)=-38

Answer 2

a. 19 b. -53

Explanation:

I did it mentally, but you plug those x values into the equation.