Factories:( a-b )² + ( a-b )
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Step-by-step explanation:
(a-b)² + (a-b)
= (a² - b² - 2ab) + [a - (-b) - 2a(-b)]
= a² - b² - 2ab + a - b - 2ab
= 2a² + 2b
= 2(a²+ b²)
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