来自李雅琴的问题
化简(1921:38:37).8m2-2(3m+4m2-1)-8        2.(3x2-xy)-xy+y2)3.3(x2y-2xy2)-2(3x2y-2xy2)     4. 3x2-〔7x2-2(x2-3x)〕
化简(1921:38:37)
.8m2-2(3m+4m2-1)-8 2.(3x2-xy)-xy+y2)
3.3(x2y-2xy2)-2(3x2y-2xy2) 4. 3x2-〔7x2-2(x2-3x)〕
1回答
2020-11-19 03:28