√y^3-6xy^2+9x^2y/x(y
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√y^3-6xy^2+9x^2y/x(y<3x<0)
rt 整个式子都是在根号下的
rt 整个式子都是在根号下的
即y-3x
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
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)
x^2-xy-6y^2+3xy+y+2
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
(x+y)(x-y)-(2xy+3y)平方
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
因式分解:x^2-6xy+9y^2+x^2y-9y^3
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y