Ответ:
Объяснение:
xy+7x-7y-x² = -x²+xy+7x-7y = -x(x-y)+7(x-y) = (-x+7)(x-y) = -(x-7)(x-y)
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Ответ:
Объяснение:
xy+7x-7y-x² = -x²+xy+7x-7y = -x(x-y)+7(x-y) = (-x+7)(x-y) = -(x-7)(x-y)