Question

(a+b)square-(a-b)square
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Answer 1

Step-by-step explanation:

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

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

= a^2 + b^2 + 2ab - a^2 - b^2 + 2ab

= 4ab

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Answer 2

Step-by-step explanation:

$(a + b) {}^{2} - (a - b) {}^{2} \\ a {}^{2} + b {}^{2} + 2ab - (a {}^{2} + b {}^{2} - 2ab) \\ a {}^{2} + b {}^{2} + 2ab - a {}^{2} - b {}^{2} + 2ab \\ = 4ab \: \: \: \: \: \: ans.$

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