[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x 还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)

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[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x 还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)
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[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x 还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)
[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x
还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)

[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x 还有一道,[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)
[3(x+y)^3-5(x+y)^2-2x-2y]/(x+y)
=[3(x+y)^3-5(x+y)^2-(2x+2y)]/(x+y)
=[3(x+y)^3-5(x+y)^2-2(x+y)]/(x+y)
=3(x+y)^2-5(x+y)-2
=3(x^+2xy+y^2)-(5x+5y)-2
=3x^2+6xy+3y^2-5x-5y-2
[(a+b)^3-2(a+b)^2+(a+b)]/(a+b)
=(a+b)^2-2(a+b)+1
=a^2+2ab+b^2-2a-2b+1
同学,这两题性质其实是一样的哦〜下次遇到这种题目不要忘记方法哦!（话说这个答案也太长了吧〜）

[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x +y)
=[3(x+ y)³-5(x+y)²-2(x+y)]÷(x+y)
=3(x+y)²-5(x+y)-2
=3x²+6xy+3y²-5x-5y-2
[(a+b)³-2(a+b)²+(a+b)]÷(a+b)
=(a+b)²-2(a+b)+1
=(a+b-1)²
=a²+2ab+b²-2a-2b+1

[3(x+ y)^3-5(x+ y)^2-2x-2y]÷(x +y)
=[3(x+ y)^3-5(x+ y)^2-2（x+y）]÷(x +y)
=3(x+ y)^2-5(x+ y)-2
[(a+b)^3-2(a+b)^2+(a+b)]÷(a+b)
=(a+b)^2-2(a+b)+1

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) (2x-3y)-(5x-y) (2X-3y)-(5x-y) (2x-5y)(3x+y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 [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 [(x+2y)(x-2y)-(2x-y)^2+(3x-y))2x-5y)]/(-x)我急用 [(x+2y)(x-2y)-(2x-y)²+(3x-y(2x-5y)]/(-x)的解答 x(x-y)2-(y-x)3 (5x+2y)(5x-2y)-(3x+2y)(3x-2y) 5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2] 2(2x+3y)(3x+2y)-(6x-y)(2x-5y) 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解 5x^3y(x-y)^3-10x^4y^3(y-x)^2 化简：[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)