Question

Solve for b.
16 = a² + b^2

Answer 1

`√((4-a)(4+a)) =b`

Explanation:

16 = a^2 + b^2

16 - a^2 =b^2

4^2 - a^2 = b^2

`√(4^2 - a^2) =b`

`√((4-a)(4+a)) =b`