(1)9a^3b^3-ab(2)mx^2-8mx+16m(3)-x^4+256(4)-a+2a^2-a^3(5)27x^2y^-18x^2y+32x^2

问题描述:

(1)9a^3b^3-ab(2)mx^2-8mx+16m(3)-x^4+256(4)-a+2a^2-a^3(5)27x^2y^-18x^2y+32x^2

(1)9a^3b^3-ab=ab(9a²b²-1)=ab(3ab+1)(3ab-1)(2)mx^2-8mx+16m=m(x²-8x+16)=m(x-4)²(3)-x^4+256=-(x^4-16²)=-(x²+16)(x²-16)=-(x²+16)(x+4)(x-4)(4)-a+2a^2-a^3=-a(a...