Question

t^2+10t+26=0
= -10± -10^2 -4*1*26/2*1
= -10 100-104/2
= 10± -4/2
t= -10+2i/2, -10-2i/2
simplify

Answer 1

\[t=\frac{-10\pm \sqrt{100-104}}{2}=\frac{-10\pm2i}{2}=-5\pm i\]