-2t^2+6+9=0

Solution for -2t^2+6+9=0 equation:

Simplifying
-2t2 + 6 + 9 = 0

Reorder the terms:
6 + 9 + -2t2 = 0

Combine like terms: 6 + 9 = 15
15 + -2t2 = 0

Solving
15 + -2t2 = 0

Solving for variable 't'.

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

Add '-15' to each side of the equation.
15 + -15 + -2t2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -2t2 = 0 + -15
-2t2 = 0 + -15

Combine like terms: 0 + -15 = -15
-2t2 = -15

Divide each side by '-2'.
t2 = 7.5

Simplifying
t2 = 7.5

Take the square root of each side:
t = {-2.738612788, 2.738612788}