Ответ:
а) аb + 2b + ac + 2c = 2(b + c) + a(b + c) = (2 + a)(b + c)
б) 9 - 3у + 3х - ху = 3(3 + x) - y(3 + x) = (3 - y)(3 + x)
а)=(а+2)*(в+с)
в) (3-у)(3+х)
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Ответ:
а) аb + 2b + ac + 2c = 2(b + c) + a(b + c) = (2 + a)(b + c)
б) 9 - 3у + 3х - ху = 3(3 + x) - y(3 + x) = (3 - y)(3 + x)
а)=(а+2)*(в+с)
в) (3-у)(3+х)