Question

please solve it question 1 pleasee

Answer 1

by rationalise we get1/√18-√32×√18+√32/√18+√32, then on solve it we get, √18+√32/18-32 ,on take factors of √18&√32 we get , 4√2+3√2/50 = 7√2/50

Answer 2

answer is
$\frac{ \sqrt{2} }{2}$