题目内容
计算:
(1)5xy-3x3+2x3-3xy-y2;
(2)4x4-x2+5(x2-2x3)-3(8x2-3x4).
(1)5xy-3x3+2x3-3xy-y2;
(2)4x4-x2+5(x2-2x3)-3(8x2-3x4).
(1)原式=-x3+2xy-y2;
(2)原式=4x4-x2+5x2-10x3-24x2+9x4
=13x4-10x3-20x2.
(2)原式=4x4-x2+5x2-10x3-24x2+9x4
=13x4-10x3-20x2.
练习册系列答案
相关题目