计算(1)(-2012)0+(-3)2-(-14)-1(2)(-2x)4(12x2)2(x-2)2(3)(x-2)(x-3)-(x+5)(x-5)(4)(-2x-y)(2x+y)-(-x+2y)2.-

题目简介

计算(1)(-2012)0+(-3)2-(-14)-1(2)(-2x)4(12x2)2(x-2)2(3)(x-2)(x-3)-(x+5)(x-5)(4)(-2x-y)(2x+y)-(-x+2y)2.-

题目详情

计算
(1)(-2012)0+(-3)2-(-
1
4
)-1

(2)(-2x)4(
1
2
x2)2(x-2)2

(3)(x-2)(x-3)-(x+5)(x-5)
(4)(-2x-y)(2x+y)-(-x+2y)2
题型:解答题难度:中档来源:不详

答案

(1)原式=1+9-(-4)=1+9+4=14;
(2)原式=16x4•(class="stub"1
2
x2•x-2)2=16x4×class="stub"1
4
=4x4;
(3)原式=x2-3x-2x+6-(x2-25)=x2-3x-2x+6-x2+25=-5x+31;
(4)原式=-(2x+y)2-(-x+2y)2=-4x2-4xy-y2-x2+4xy-4y2=-5x2-5y2.

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