sqrt(18) = sqrt( 9 x 2) = sqrt(9) X sqrt(2) = 3sqrt(2)

Hemce

3(3Sqrt(2) - 16/Sqrt(2) + 50 =

9sqrt(2) + 16/sqrt(2) + 50 =

9sqrt(2)sqrt(2) - 16 + 50sqrt(2) =

9(2) - 16 + 50 sqrt(2)

18 - 16 + 50 sqrt(2)

2 + 50sqrt(2)

3√18 - 16/√2 + 50=

=(3√18*√2 - 16 + 50√2) / √2=

=(3√36 - 16 + 50√2) / √2=

=(3*6 - 16 + 50√2) / √2=

=(18 - 16 + 50√2) / √2=

=(2 + 50√2) / √2=

=2/√2 + 50= √2+50

The answer is 50+square root of 2