Ответ:
2ab — (a + b)² + 2а²= (a – b)(a + b)
2ab-(a²+2ab+b²)+2a²=(a-b)(a+b)
2ab- a²-2ab-b²+2a²=(a-b)(a+b)
a²-b²=(a-b)(a+b)
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Ответ:
2ab — (a + b)² + 2а²= (a – b)(a + b)
2ab-(a²+2ab+b²)+2a²=(a-b)(a+b)
2ab- a²-2ab-b²+2a²=(a-b)(a+b)
a²-b²=(a-b)(a+b)