化简:(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-12
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/08/17 22:30:34
化简:
(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-
(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-
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![化简:(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-12](/uploads/image/z/19103506-34-6.jpg?t=%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%881%EF%BC%89%5B%EF%BC%88x%2B2y%EF%BC%89%EF%BC%88x-2y%EF%BC%89-%EF%BC%882x-y%EF%BC%892%2B%EF%BC%883x-y%EF%BC%89%EF%BC%882x-5y%EF%BC%89%5D%C3%B7%EF%BC%88-12)
(1)[(x+2y)(x-2y)-(2x-y)2+(3x-y)(2x-5y)]÷(-
1
2x),
=(x2-4y2-4x2-y2+4xy+6x2+5y2-17xy)÷(-
1
2x),
=(3x2-13xy)÷(-
1
2x),
=-6x+26y;
(2)(-4x2+12x3y2-16x4y3)÷(-4x2)-(-2xy2-y)(-2xy-1),
=1-3xy2+4x2y3-(4xy2+4x2y3+y),
=1-3xy2+4x2y3-4xy2-4x2y3-y,
=1-7xy2-y.
1
2x),
=(x2-4y2-4x2-y2+4xy+6x2+5y2-17xy)÷(-
1
2x),
=(3x2-13xy)÷(-
1
2x),
=-6x+26y;
(2)(-4x2+12x3y2-16x4y3)÷(-4x2)-(-2xy2-y)(-2xy-1),
=1-3xy2+4x2y3-(4xy2+4x2y3+y),
=1-3xy2+4x2y3-4xy2-4x2y3-y,
=1-7xy2-y.
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