Posted by Dot on .
t^440t^2+40=0

algebra 
Reiny,
I will assume you are trying to solve.
t^440t^2+40=0
I first solved for t^2 using the quadratic formula
to get t^2 = 20 +√360
both of which are positive
then t = +√(20 +√360) which represents 4 answers