求哥哥姐姐叔叔阿姨帮帮忙,
问题描述:
求哥哥姐姐叔叔阿姨帮帮忙,
(1)-2x(ab)^2*3/2x(ab)^3 (2)2x^m-1/2x^(m-2)y^n-2+3y^n)(-4x^(m+2)y^(n+2))
(1)(-2x(ab)^2*3/2x(ab)^3 (2)2x^m-1/2x^m-2y^n-2+3y^n)(-4x^m+2y^n+2)
答
1.
=-2xa^2b^2*3/2xa^3b^3
=-3x^2a^5b^5
2.第二题是怎么做,其实我加了括号了的,原题没有=(2-1/2-4)x^m+(-2+3-2)y^n-4=-5/2x^m-y^n-4题太乱,不知对不对