-5t^2+20+60=0

Solution for -5t^2+20+60=0 equation:

Simplifying
-5t2 + 20 + 60 = 0

Reorder the terms:
20 + 60 + -5t2 = 0

Combine like terms: 20 + 60 = 80
80 + -5t2 = 0

Solving
80 + -5t2 = 0

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-80' to each side of the equation.
80 + -80 + -5t2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -5t2 = 0 + -80
-5t2 = 0 + -80

Combine like terms: 0 + -80 = -80
-5t2 = -80

Divide each side by '-5'.
t2 = 16

Simplifying
t2 = 16

Take the square root of each side:
t = {-4, 4}