(8/9xy^2-4/3x^2y)*(9/4x^2y^2)+3x^2y^2*x^2y
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(8/9xy^2-4/3x^2y)*(9/4x^2y^2)+3x^2y^2*x^2y
![(8/9xy^2-4/3x^2y)*(9/4x^2y^2)+3x^2y^2*x^2y](/uploads/image/z/16795665-9-5.jpg?t=%288%2F9xy%5E2-4%2F3x%5E2y%29%2A%289%2F4x%5E2y%5E2%29%2B3x%5E2y%5E2%2Ax%5E2y)
(8/9xy^2-4/3x^2y)*(9/4x^2y^2)+3x^2y^2*x^2y
=2x^3y^4-3x^4y^3+3x^4y^3
=2x^3y^4
=2x^3y^4-3x^4y^3+3x^4y^3
=2x^3y^4
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/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)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
因式分解:4a^2(x-y)+9(y-x) -4x^2y^2+x^3y+4xy^3
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
(2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)+2x^4y^2÷(xy)^2
(x+y)(x-y)-(2xy+3y)平方
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-