Question

1by2root486 - root27by2

Answer 1

root(486)/2 -root (27/2)
root(2×243)/2 - root(9×3/2)
root(2×3×81)/2 -3root(3/2)
9root(6)/2 - 3 root(3/2) ×root(2) /root(2) (rationalise)
9/2 root(6) -3 root(6)/2
(9root(6) -3 root (6)) by 2
6root(6) by 2
3root(6)