Question

十字相乘的几道题目1.a^3-5a^2b-24ab^22.3ab^2-9a^2b^2+6a^3b^23.(x^2-2x)

Answer 1

1 a(a+3)(a-8)

2 3ab^2(a-1)(2a-1)

3 （x-1)^2(x-3)(x=1)

4 (x-3)(x+1)(x^2-3+x)