(-3x+2y)(3x+2y)
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(-3x+2y)(3x+2y)(-3x+2y)(3x+2y)(-3x+2y)(3x+2y)原式=(2y-3x)(2y+3x)=(2y)²-(3x)²=4y²-9x&sup
(-3x+2y)(3x+2y)
(-3x+2y)(3x+2y)
(-3x+2y)(3x+2y)
原式=(2y-3x)(2y+3x)
=(2y)²-(3x)²
=4y²-9x²
(2/5-1/3)/ 5/6
=(6/15-5/15)/(5/6)
=1/15×6/5
=2/25
7.5+2.5/0.5
=7.5+5
=12.5
(4/5-2/3)/(1/2+2/3)
=(12/15-10/15)/(3/6+4/6)
=(2/15)/(7/6)
=2/15×6/7
=4/35
x(x-y)2-(y-x)3
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
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化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
2X(2X-3Y)-3Y(X+Y)
(-2x y)^2-(3y-x)(-x-3y)
（x+2y)^2-(x+y)(3x-y)
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3x(x-y)+2y(x-y) 计算
化简3(x-y)-7(x--y)+2(y-x)
因式分解:3x(x-y)+2y(y-x)
(x-y)^3×（x-y)^2×(y-x)
分解因式：3x(y-x)-2y(x-y)