56a2-40ab+63ac-45bc =
= 8a(7a-5b)+9c(7a-5b) =
= (8a+9c)(7a-5b) .
... ответ на фотографии ...
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56a2-40ab+63ac-45bc =
= 8a(7a-5b)+9c(7a-5b) =
= (8a+9c)(7a-5b) .
... ответ на фотографии ...