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计算:(1)(22010-211090)0-(-14)-2+(-0.125)9×810(2)(a-2b+3)(a+2b-3)(3)(m-n-3)2(4)(3x+2y)2(3x-2y)2

题目详情
计算:
(1)(22010-2110900-(-
1
4
-2+(-0.125)9×810
(2) (a-2b+3)(a+2b-3)
(3)(m-n-3)2
(4)(3x+2y)2(3x-2y)2
▼优质解答
答案和解析
(1)原式=1-16-8=-23;
(2)原式=a2-(2b-3)2=a2-4b2+12b-9;
(3)原式=m2+n2+9-2mn+6n-6m;
(4)原式=[(3x+2y)(3x-2y)]2=(9x2-4y22=81x4-72x2y2+16y4