Question

if a =underoot 2 +1 find the value of (a-1/a)²​

Answer 1

Answer:

Rationalizing the denominator ✓2+1 we get, 1/A = 1/✓2 +1 × ✓ 2-1/ ✓2-1 = (✓2-1)/(✓2+1)(✓2-1) = (✓2-1)/( ✓2)² - (1)²