405t^2-20=0

Solution for 405t^2-20=0 equation:

Simplifying
405t2 + -20 = 0

Reorder the terms:
-20 + 405t2 = 0

Solving
-20 + 405t2 = 0

Solving for variable 't'.

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

Add '20' to each side of the equation.
-20 + 20 + 405t2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 405t2 = 0 + 20
405t2 = 0 + 20

Combine like terms: 0 + 20 = 20
405t2 = 20

Divide each side by '405'.
t2 = 0.04938271605

Simplifying
t2 = 0.04938271605

Take the square root of each side:
t = {-0.222222222, 0.222222222}