Question

If x=1-root(2),then find the value of (x-1/x)whole square

Answer 1

x-1/x = x square-1 / x

as we know that x= 1-root 2

(1-√2) whole square -1 / 1-√2

=1-2√2+2-1 /1-√2

=2-2√2/1-√2

taking 2 common in the numerator

2(1-√2)/1-√2

1-√2 gets canclled

so the finall answer is 2