(3x²/4y)²乘4y/3x再加x²/2y²除以2y²/x
(3x²/4y)²乘4y/3x再加x²/2y²除以2y²/x
化简求值.(x-2y分之4xy 再加+x)除以4x³-x²y分之x²+4xy+4y
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
2x^4+4x^2y^2+2y^4除以(x²+y²)
(3y分之2x²)²乘4x分之3y+2y²分之x²除以xy分之3
(3x-y)²-2x(4x-5y)-(x+2y)²
已知x²+3xy-4y²=0,求(x-2y)除以(x+2y)的值
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²