Answer
The proof is below.
Work Step by Step
Multiplying the given expression out as the problem asks, we find: $$\left(a+b\right)^2 \\ a^2+ab+ab+b^2\\ a^2+2ab+b^2$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 5 Polynomials and Polynomial Functions - 5.3 Add, Subtract, and Multiply Polynomials - 5.3 Exercises - Skill Practice - Page 350: 53
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