8.
You evaluate the expression given the value of n.
The expression is:
[tex]4(n-1)^2[/tex]
We want the value of this expression, GIVEN that n is 6.
So, let's substitute 6 into n and find out the answer. Shown below:
[tex]\begin{gathered} 4(n-1)^2 \\ =4(6-1)^2 \\ =4(5)^2 \\ =4\times25 \\ =100 \end{gathered}[/tex]
