将x^2+7xy+3y^2+9x+2y-5因式分解(过程)

将x^2+7xy+3y^2+9x+2y-5因式分解(过程) x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出, 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) 将x²+2xy+y²+3x+3y+2和2x²-32xy+y²+7x-5y+6因式分解 (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 将多项式3x^2y^2-xy^3+5x^4y-7y^5+x^6y^4分别按x,y降幕排列 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x^2y-9y)/(xy+3y) 将x^2-xy变形为x(x-y)是( )将x(x-y)变形为x^2-xy是( ) 当实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x平方y+xy平方=多少 3/x —2/y=3 (2x-3y-xy) / (7xy+9y-6x)= X^Y-2XY^2+y^3 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 -2x(3x-7y)+(x-y)(x^2+xy+y^2） 计算 已知xy/x+y=3,则代数式2x-7xy+2y/-x+xy-y的值是多少? 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-xy+3y-3x 2x+xy-y-4x+5y-6