Solve for: x^2+4^2=5^2

Expression: $x^{2}+4^{2}=5^{2}$

Simplify

$x^{2}=9$

Subtract $4^{2}$ from both sides

$x^{2}+4^{2}-4^{2}=5^{2}-4^{2}$ $x=\sqrt{9},x=-\sqrt{9}$

$\sqrt{9}=3$

$x=3,x=-3$