6x^2+7xy+2y^2-8x-5y+2 因式分解如题

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 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 因式分解:8(x-2y)-x(7x+y)+xy. 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 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=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值 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 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 6（x-y)-7(xy)=21,2(x-y)-5(x+y)=-1 x^2-xy-2y^2+x+7y-6 x²+xy-2y²-x+7y-6 2X^+XY-Y^-4X+5Y-6 2x^+xy-y^-4x+5y-6=? x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) x(y-x)-y(x-y) (-3xy)*5c^2Y+6x^2(7/2xy^2-2y^2) 计算.化简4x²+2x+7+3x-8x²-26x²y+2xy-8x²y-4x-5xy+2y²x²-6x²y