化简【(-2x^2y^3)^2*x-2x(5xy^2)^3】÷9x^3y^6带过程
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
化简:x-y/x+3y÷x^2-y^2/x^2+6xy+9y^2-2y/x+y
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
因式分解:2x^2+x+x^3; 2x^2-3x-6xy+9y要过程
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
2x平方y-2xy+3xy平方+5+2xy+x平方y-3xy平方-3 过程!
数学题 化简,要过程第一题2xy-{5x-3[xy-三分之一x(y+1)]-4xy}第二题二分之一x-(2x-三分之二y