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计算:(1)(m+n)2(2)(x-y)2(3)(a+b)(2a-5b)(4)3x(13x2+23)(5)(2y-3)(3y+2)-(y+2)(y-4)(6)-10xy2÷5xy(7)65a3x4÷35ax3.

题目详情
计算:
(1)(m+n)2
(2)(x-y)2
(3)(a+b)(2a-5b)
(4)3x(
1
3
x2+
2
3

(5)(2y-3)(3y+2)-(y+2)(y-4)
(6)-10xy2÷5xy
(7)
6
5
a3x4÷
3
5
ax3
▼优质解答
答案和解析
(1)原式=m2+2mn+n2
(2)原式=x2-2xy+y2
(3)原式=2a2-3ab-5b2
(4)原式=x3+2x;
(5)原式=6y2-5y-6-y2+2y+8=5y2-3y+2;
(6)原式=-2y;
(7)原式=2a2x.