Ответ:
5(а+b)²-10аb=5(a²+2ab+b²)-10ab=5a²+10ab+5b²-10ab=5a²+5b²=5(a²+b²)
вроде так
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Ответ:
5(а+b)²-10аb=5(a²+2ab+b²)-10ab=5a²+10ab+5b²-10ab=5a²+5b²=5(a²+b²)
вроде так