化简:
(1)[(x+2y)(x-2y)-(2x-y)
2+(3x-y)(2x-5y)]÷(-
x);
(2)(-4x
2+12x
3y
2-16x
4y
3)÷(-4x
2)-(-2xy
2-y)(-2xy-1).
人气:454 ℃ 时间:2019-08-19 15:14:40
解答
(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-12x),=(x2-4y2-4x2-y2+4xy+6x2+5y2-17xy)÷(-12x),=(3x2-13xy)÷(-12x),=-6x+26y;(2)(-4x2+12x3y2-16x4y3)÷(-4x2)-(-2xy2-y)(-2xy...
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