а) 3b^2-3b = 3b(b-1)
б) 4с^2-12с^5 = 4c^2 ( 1-3c^3)
в) 2z^5q^2-4z^3q+6z^2q^3 = 2z^2q(z^3q-2z+3z-q^2)
г) 7a^4b^3-14a^3b^4+21a^2b^5 = 7a^2b^3(a^2-7ab+7b^2)
а) 3b^2-3b = 3b(b-1)
б) 4с^2-12с^5 = 4c^2 ( 1-3c^3)
в) 2z^5q^2-4z^3q+6z^2q^3 = 2z^2q(z^3q-2z+3z-q^2)
г) 7a^4b^3-14a^3b^4+21a^2b^5 = 7a^2b^3(a^2-7ab+7b^2)