Answer:
[tex]\huge\boxed{Q = \sqrt{A+2a}}[/tex]
Step-by-step explanation:
[tex]A = Q^2 -2a[/tex]
Adding 2a to both sides
[tex]Q^2 = A+2a[/tex]
Taking sqrt on both sides
[tex]Q = \sqrt{A+2a}[/tex]
