Question

evaluate the expression when a = 8.
2a²

Explanation:

Step1: Substitute \( a = 8 \) into the expression \( 2a^2 \)

First, we need to calculate \( a^2 \) when \( a = 8 \). So \( a^2=8^2 = 64 \).

Step2: Multiply the result by 2

Now, we have the expression \( 2\times a^2 \), and since \( a^2 = 64 \), we calculate \( 2\times64 \).
\( 2\times64 = 128 \)

Answer:

128