-15t^2+120-105=0

Solution for -15t^2+120-105=0 equation:

Simplifying
-15t2 + 120 + -105 = 0

Reorder the terms:
120 + -105 + -15t2 = 0

Combine like terms: 120 + -105 = 15
15 + -15t2 = 0

Solving
15 + -15t2 = 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 + -15t2 = 0 + -15

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

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

Divide each side by '-15'.
t2 = 1

Simplifying
t2 = 1

Take the square root of each side:
t = {-1, 1}