4x^2y·(-xy^2)/x^2y^4得多少?最好有过程,谢谢了~~
问题描述:
4x^2y·(-xy^2)/x^2y^4得多少?最好有过程,谢谢了~~
(3x+2)(x-3)-3(x-2)^2得多少?
答
4x²y*(-xy²)/x²y⁴
=-4x³y³/x²y⁴
=-4x/y