5x²√xy÷12倍√y分之x×3倍√x分之y²正确率高

5x²√xy÷12倍√y分之x×3倍√x分之y²正确率高
5x²√xy÷12倍√y分之x×3倍√x分之y²
正确率高

5x²√xy÷12倍√y分之x×3倍√x分之y²正确率高
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5x^2*x^1/2*y^1/2 ÷ 【12x^1/2y^(-1/2)】*3x^(-1/2)*y
=5x^3/2y^1/2 *1/12x^(-1/2)*y^1/2*3x^(-1/2)*y
=5/4 * x^(3/2-1/2-1/2)*y^(1/2+1/2+1)
=5/4x^(1/2)*y^2