Ответ:
(2a-*)²=*-*+9b²
2a(x-y)-9b²(x-y)
2a²(x-y)+9b²(x-y)
(x-y)(2a²+9b²)
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Ответ:
(2a-*)²=*-*+9b²
2a(x-y)-9b²(x-y)
2a²(x-y)+9b²(x-y)
(x-y)(2a²+9b²)