帮个忙,计算题1.（x^2-6xy+9y^2）÷(x-3y) 2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^

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帮个忙,计算题
1.（x^2-6xy+9y^2）÷(x-3y)
2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^3y^3÷2x^2y^2)]}

$帮个忙,计算题1.（x^2-6xy+9y^2）÷(x-3y) 2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^$

1.（x^2-6xy+9y^2）÷(x-3y)
=(x-3y)^2/(x-3y)
=x-3y
2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^3y^3÷2x^2y^2)]}
=4x^5y^3÷{x^4y^3÷[x^3y^2÷(xy/2)]}
=4x^5y^3÷{x^4y^3÷(2x^2y)}
=8x^3*y

帮个忙,计算题1.（x^2-6xy+9y^2）÷(x-3y) 2.4x^5y^3÷{x^4y^3÷[x^3y^2÷(x^ 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 计算题：(-3x^2y^3+6x^2y^2-1/3xy)÷(-1/3xy) 计算题(-3x^2y^2+6x^2y^2-1/3xy)÷(-1/3xy) (2x-y)(2x+y)+(2x-y)(y-4x)+2y(y-3x)+2x^4y^2÷(xy)^2 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y 急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy) 计算题(2x+y)(x+2y)-(2x+3y)(3x-2y) [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- 计算题:(9x-4y)(-3x+2y)(-2y-3x) 化简:x-y/x+3y÷x^2-y^2/x^2+6xy+9y^2-2y/x+y (2×y+x²-y²)-(x²-y²-3xy) 计算题,