/b√ab的5次方*(-3/2√a的3次方b)/3√b/a等于

2/b√ab的5次方除(-3/2√a的3次方b)÷1/3√b/a,其中a=1/2,b=3
=2/b*b²√ab÷(-3a/2√ab)÷1/3a√ab
=-4b/3a÷1/3a√ab
=-4b/(√ab)
=-(4√ab)/a
=-4√(3/2)/(1/2)
=-8√(3/2)
=-4√6
打字不易,化简