-2x^6+x^5y^2-x^2y^5-1次数是什么
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-2x^6+x^5y^2-x^2y^5-1次数是什么-2x^6+x^5y^2-x^2y^5-1次数是什么-2x^6+x^5y^2-x^2y^5-1次数是什么-2x^6+x^5y^2-x^2y^5-1次
-2x^6+x^5y^2-x^2y^5-1次数是什么
-2x^6+x^5y^2-x^2y^5-1次数是什么
-2x^6+x^5y^2-x^2y^5-1次数是什么
-2x^6+x^5y^2-x^2y^5-1次数是7
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[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2
2(2x+3y)(3x+2y)-(6x-y)(2x-5y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
因式分解x次方-y次方+5x-y+6【x-y+2】【x+y+3】
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
5x(x-y)+2y(x-y)
化简:5(x-y)+2(x+y)-3(x-y)
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
（X+2Y)(5X-2Y)
(x+2y)(5x-2y)
4x+2y-5x-y
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
(x-y)^2+5(x-y)-14
(2x-5y)(3x+y)
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)