2t^2-20=4

Solution for 2t^2-20=4 equation:

Simplifying
2t2 + -20 = 4

Reorder the terms:
-20 + 2t2 = 4

Solving
-20 + 2t2 = 4

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 + 2t2 = 4 + 20

Combine like terms: -20 + 20 = 0
0 + 2t2 = 4 + 20
2t2 = 4 + 20

Combine like terms: 4 + 20 = 24
2t2 = 24

Divide each side by '2'.
t2 = 12

Simplifying
t2 = 12

Take the square root of each side:
t = {-3.464101615, 3.464101615}