计算:(1)3x^2y^4/8z^3*10z62/-6x^2y^2(2)4x^2-y^2/3x^2y÷2x-y/xy
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计算:(1)3x^2y^4/8z^3*10z62/-6x^2y^2(2)4x^2-y^2/3x^2y÷2x-y/xy
计算:(1)3x^2y^4/8z^3*10z62/-6x^2y^2(2)4x^2-y^2/3x^2y÷2x-y/xy
计算:(1)3x^2y^4/8z^3*10z62/-6x^2y^2(2)4x^2-y^2/3x^2y÷2x-y/xy
(1)
3x^2y^4/(8z^3)*10z^2/(-6x^2y^2)
=-(3/8*10/6)*x^2y^4/z^3*z^2/(x^2y^2)
=-5/8*y²/z
=-(5y²)/(8z)
(2)
(4x^2-y^2)/(3x^2y)÷(2x-y)/(xy)
=(2x+y)(2x-y)/(3x²y)×xy/(2x-y)
=(2x+y)/(3x)
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