Question

What is the value of the expression below when z=2. 8z^2-8z+2

Answer 1

The value of the expression 8z²-8z+2 when z=2 is 18, after performing the substitution and simplification steps.

Step-by-step explanation:

To find the value of the expression 8z²-8z+2 when z=2, we substitute 2 for every z in the equation and then simplify.

First, calculate 8z²:
8 * (2²) = 8 * 4 = 32.

Then, calculate 8z:
8 * 2 = 16.

Now plug these values back into the expression:
32 - 16 + 2.

Simplify:
32 - 16 = 16,
16 + 2 = 18.

So, the value of the expression when z=2 is 18.

Answer 2

To find the value of the expression 8z2−8z+28z2−8z+2when z=2z=2, simply substitute zzwith 2:8(22)−8(2)+28(22)−8(2)+2Now, calculate the values:8(4)−16+28(4)−16+232−16+232−16+216+216+21818So, when z=2z=2, the value of the expression 8z2−8z+28z2−8z+2is 18.