(-2x/y)^2*(-y^2/x)^3÷(-3xy^3)
= 4x^2/y^2 * (-y^6/x^3) * (-1/(3xy^3))
= 4x^2/y^2 * y^6/x^3 * 1/(3xy^3)
= 4 * y/x * 1/(3x)
= 4y/(3x^2)
(-y分之2x)^2*(-x分之y^2)^3÷（-3xy^3)
(-y分之2x)^2*(-x分之y^2)^3÷（-3xy^3)
数学人气：435 ℃时间：2020-06-02 00:54:50
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