来自陈春荣的问题
计算:(整式加减)(1)(8xy-3x2)-5xy-3(xy-2x2+3);(2)3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y);(3)3(x2y-2xy2+x)-2(2x+5x2y-xy2);(4)5x2-[7x-(4x-3)
计算:(整式加减)
(1)(8xy-3x2)-5xy-3(xy-2x2+3);
(2)3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y);
(3)3(x2y-2xy2+x)-2(2x+5x2y-xy2);
(4)5x2-[7x-(4x-3)-2x2].
1回答
2020-04-30 20:18