Solve algebraic expressions (a-b)(a-b) - (a+b)(a-b) = – InterviewSolution

1.

Solve algebraic expressions (a-b)(a-b) - (a+b)(a-b) =

Answer»

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Step-by-step EXPLANATION:

(a-b)(a-b)-(a+b)(a-b)

→ Here we have (a-b)(a-b) = (a-b)²

& (a+b)(a-b) = a²-b²

→(a-b)² - (a² - b²)

→ a² + b² - 2AB - a² + b²

→ 2b² -2ab

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

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