How do you multiply (3a7b)2?

1 Answer
Jan 18, 2017

See the entire multiplication process below:

Explanation:

This problem can be rewritten as:

(3a7b)(3a7b)

To multiply these two terms you multiply each individual term in the left parenthesis by each individual term in the right parenthesis.

(3a7b)(3a7b) becomes:

(3a×3a)(3a×7b)(7b×3a)+(7b×7b)

9a221ab21ab+49b2

We can now combine like terms:

9a2+(2121)ab+49b2

9a242ab+49b2