SOLUTION: a) Rationalise the denominator of 12/sqrt3 b) Work out the valule of (sqrt2+sqrt8)^2 Please help :)

Algebra ->  Square-cubic-other-roots -> SOLUTION: a) Rationalise the denominator of 12/sqrt3 b) Work out the valule of (sqrt2+sqrt8)^2 Please help :)      Log On


   

Question 925319: a) Rationalise the denominator of
12/sqrt3
b) Work out the valule of
(sqrt2+sqrt8)^2
Please help :)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
12/√3 = 12√3 / 3 = 4√3
......
(√2 + √8) (√2 + √8) = 2 + 8 + 8 = 18
 

F	First terms               2

O	Outside terms √16 = 4

I	Inside terms   √16 = 4

L	Last terms                8