A2+b2 = C2solve for a
\(a^2+b*2=c^2\) \(a^2+2b=c^2\) \(\text{Regroup terms}\) \(a^2=c^2-2b\) \(\text{Subtract 2b from both sides}\) \(a=\pm \sqrt{c^2-2b}\) \(\text{Take the square root of both sides}\)