square root of 2+(square root of 1+k)equals the square root of 5. Solve for k

Answer 1

I read that as

√2 + √(1+k) = √5
√1+k = √5 - √2
square both sides

1+k = 5 - 2√10 + 2
k = 6 - 2√10 or appr -0.325

Answer 2

please help me compare fraction

Answer 3

sure