Ответ:
7ab+14b-7a-14 = 7(ab+2b-a-2) = 7(b(a+2)-(a+2)) = 7(a+2)(b-1)
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Ответ:
7ab+14b-7a-14 = 7(ab+2b-a-2) = 7(b(a+2)-(a+2)) = 7(a+2)(b-1)