Question

(a + b)^2 - (a - b)^2 = .........

Answer 1

Answer:

a²+b²+2ab-a²+b²-2ab

2a²+2b²

Step-by-step explanation:

2ab and - 2ab gets canceled left are

a² and b²

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Answer 2

Answer:

4ab

Step-by-step explanation:

$(a+b)^2-(a-b)^2\\=(a+b)(a+b)-(a-b)(a-b)\\=a(a+b)+b(a+b)-[a(a-b)-b(a-b)]\\=a^2+ab+ab+b^2-(a^2-ab-ab+b^2)\\=a^2+2ab+b^2-a^2+2ab-b^2\\=4ab$

Hope it helps!

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