负2分之3倍的根号2.25乘以5分之1倍的根号1又9分之2=

问题描述:

负2分之3倍的根号2.25乘以5分之1倍的根号1又9分之2=

等于-3√11/20

原式=(-3/2)√2.25×(1/5)√(1又2/9)
=(-3/2)×(1/5)×√(2.25×1又2/9)
=(-3/10)×√(9/4×11/9)
=(-3/10)×√(11/4)
=(-3/10)×√11/2
=(-3√11)/20