Answer:
Happy Thanksgiving, my friends.
Step-by-step explanation:
For this case we have the following expression:
We must indicate the first step that allows to start the simplification of the expression.
It is observed that the first step to follow is to solve the square of the binomial that is in the numerator of the expression.
Option A
3 - 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63
7 - 7, 14, 21, 28, 35, 42, 49, 56, 63
First three common multiples of 3 and 7 are 21, 42, and 63.
Answer - 21, 42, 63
Hope this Helps!!