Question

Find the value of the expression: a 8x^3 for x=-2;-1;0;3

Answer 1

Simply replace each x with the given value of x.

When x = -2:

`8(-2)^3\\8(-8)\\\\=-64`

When x = -1:

`8(-1)^3\\8(-1)\\\\=-8`

When x = 0:

`8(0)^3\\8(0)\\\\=0`

When x = 3:

`8(3)^3\\8(27)\\\\=216`

OR you could use a graph for this, here is how the function is going to look: