Answer
A) No
B) $9t^2-42t+49$
Work Step by Step
Given $$\begin{aligned}
(3t-7)^2.
\end{aligned}$$ Part A
No. The power rule is not applicable to addition.
Part B
We square the binomial by multiplying the binomials using the FOIL method:
$$\begin{aligned}
(3t-7)^2&= (3t-7)(3t-7)\\
&= 9t^2-21t-21t+49\\
&= 9t^2-42t+49.
\end{aligned}$$
