Question

（1）6倍根号14/8倍根号18 （2）-根号7/3倍根号15分之14*2分之3倍根号2分之5

Answer 1

解(1)：原式=(6√14)/(8√18)

=(6÷8)×√(14÷18)

=(3/4)×√(7/9)

=(3/4)×(√7)/3

=(√7)/4

(2)：原式=-(√7)/[3√(14/15)]×(3/2)√(5/2)

=-(1÷3×3/2)×√(7÷14/15×5/2)

=-(1/3×3/2)×√(7×15/14×5/2)

=-(1/2)×√(75/4)

=-(1/2)×(5√3)/2

=-(5√3)/4