(-5X^2y)^3 ÷(-1/5xy^2)=-125x^6y^3÷-1/5xy^2=-125x^6y^3*-5/1xy^2=625x^7y^5(a-4)(1-c)+(4-a)c=-(4-a)(1-c)+(4-a)c=(4-a)c-(4-a)(1-c)第一题正确答案:625x^5y 第二题正确答案:(a-4)(1-2c)
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5x^2y/-1/2xy*3xy^2
若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y)
5xy^2-{2x^y-[3xy^2-(xy^2-2x^2y)]/(-1/2xy)}
已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
若xy=2(x+y),求 (3x-5xy+3y)÷(-x+3xy-y) 的值
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
(-2xy+2x+5y)-(3xy+2y-2x)-(x+4y+xy)其中x-y=4xy=-1
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)²
((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy)
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
xy^2-5x^2y+1/2xy^2+2/3x^y
5xy平方+3x平方y-xy平方-2x平方y-1 合并同类项
(5x²y-2xy²-3xy)-(2xy+5x²y-2xy²),x=-1/5,y=-1/3
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2