0=2+9t-5t^2

Solution for 0=2+9t-5t^2 equation:

Simplifying
0 = 2 + 9t + -5t2

Solving
0 = 2 + 9t + -5t2

Solving for variable 't'.

Combine like terms: 0 + -2 = -2
-2 + -9t + 5t2 = 2 + 9t + -5t2 + -2 + -9t + 5t2

Reorder the terms:
-2 + -9t + 5t2 = 2 + -2 + 9t + -9t + -5t2 + 5t2

Combine like terms: 2 + -2 = 0
-2 + -9t + 5t2 = 0 + 9t + -9t + -5t2 + 5t2
-2 + -9t + 5t2 = 9t + -9t + -5t2 + 5t2

Combine like terms: 9t + -9t = 0
-2 + -9t + 5t2 = 0 + -5t2 + 5t2
-2 + -9t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-2 + -9t + 5t2 = 0

Factor a trinomial.
(-1 + -5t)(2 + -1t) = 0

Subproblem 1
Set the factor '(-1 + -5t)' equal to zero and attempt to solve:

Simplifying
-1 + -5t = 0

Solving
-1 + -5t = 0

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

Add '1' to each side of the equation.
-1 + 1 + -5t = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -5t = 0 + 1
-5t = 0 + 1

Combine like terms: 0 + 1 = 1
-5t = 1

Divide each side by '-5'.
t = -0.2

Simplifying
t = -0.2
Subproblem 2
Set the factor '(2 + -1t)' equal to zero and attempt to solve:

Simplifying
2 + -1t = 0

Solving
2 + -1t = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1t = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1t = 0 + -2
-1t = 0 + -2

Combine like terms: 0 + -2 = -2
-1t = -2

Divide each side by '-1'.
t = 2

Simplifying
t = 2
Solution
t = {-0.2, 2}