2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
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2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2合并同类项2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2合并同类项2x^4y^2-3x^2y-5x^4y^2+x^2y
2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
2x^4y^2-3x^2y-5x^4y^2+x^2y-7xy^2 合并同类项
= -2x^2y- 3x^4y^2 -7xy^2
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因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
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
5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
4x+2y-5x-y
(x+3y-4)(2x-y)
计算(2x-3y)(x+4y)-(3x+y)(x-2y)(2x-3y)(x+4y)-(3x+y)(x-2y)
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²