题目内容
计算
(1)(
)-2-23×0.125+20110+|-1|
(2)(-2x)•(2x2y-4xy2)
(3)(x+y-3)(x-y+3)
(4)(x+1)(x2+1)(x4+1)(x-1)
(1)(
1 |
2 |
(2)(-2x)•(2x2y-4xy2)
(3)(x+y-3)(x-y+3)
(4)(x+1)(x2+1)(x4+1)(x-1)
(1)原式=4-8×0.125+1+1
=4-1+1+1
=5;
(2)原式=-4x3y+8x2y2;
(3)原式=x2-(y-3)2=x2-y2+6y-9;
(4)原式=(x2+1)(x2+1)(x4+1)
=(x4-1)(x4+1)
=x8-1.
=4-1+1+1
=5;
(2)原式=-4x3y+8x2y2;
(3)原式=x2-(y-3)2=x2-y2+6y-9;
(4)原式=(x2+1)(x2+1)(x4+1)
=(x4-1)(x4+1)
=x8-1.

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