5x^2+6xy+2y^2-14x-8y+10=0(2x-y-2)^2+(x+y+2)^2=5x^2-6xy+y^2+10y+25=0注:后两题为整数解
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因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
3x²-2xy-y²+2x+6y=8,2x²-3xy-5y²+3x+17y=14
2X^+XY-Y^-4X+5Y-6
2x^+xy-y^-4x+5y-6=?
3(x-y)²-7(x-y)+8(x-y)²+6(x-y)求详细过程(2) 5xy-4x²y-8xy²+3xy-xy²+4x²y
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
已知xy/x+y=2,求代数式8x-5xy+8y/-x+3xy-y的值
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
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)
因式分解:-x平方+4x-4;8(x平方-2y平方)-x(7x+y)+xy,4x三次方-4x平方y-(x-y),x平方y-5xy平方+6y三次方
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
因式分解:8(x-2y)-x(7x+y)+xy.