Question

If √2=1.414.then what is the value of √2-1 √2+1

Answer 1

(√2-1)(√2+1)=1 because it gives the identity a square - b square.

Answer 2

=( √(2)−1)(√(2)+1)
=(√(2^(2))−(1^(2))
=2-1
=1