Question

(3根号下27-6根号下1/2)-(8根号下0.125-6根号下1/12)

9根号下45*3根号下1/5*3/2根号下8/3
（根号下3-1)^2-(根号下3）^2

Answer 1

1. [3√27 －6√(1/2)] - [8√0.125-6√(1/12)]

   =9√3 - 3√2 -2√2 + √3

   =10√3 - 5√2

2. 9√(45×3) √(3/10)√(8/3)=54√3

3. (√3 - 1)^2 - (√3)^2 = (2√3-1)(-1)=1-2√3

Answer 2

(3根号下27-6根号下1/2)-(8根号下0.125-6根号下1/12)
=9√3-3√2-2√2+√3
=10√3-5√2

9根号下45*3根号下1/5*3/2根号下8/3
=27√（45x1/5）x√6
=81√6

（根号下3-1)^2-(根号下3）^2
=3-2√3+1-3
=1-2√3