4t^2-15t=-9

Solution for 4t^2-15t=-9 equation:

Simplifying
4t2 + -15t = -9

Reorder the terms:
-15t + 4t2 = -9

Solving
-15t + 4t2 = -9

Solving for variable 't'.

Reorder the terms:
9 + -15t + 4t2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -15t + 4t2 = 0

Factor a trinomial.
(3 + -4t)(3 + -1t) = 0

Subproblem 1
Set the factor '(3 + -4t)' equal to zero and attempt to solve:

Simplifying
3 + -4t = 0

Solving
3 + -4t = 0

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

Add '-3' to each side of the equation.
3 + -3 + -4t = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -4t = 0 + -3
-4t = 0 + -3

Combine like terms: 0 + -3 = -3
-4t = -3

Divide each side by '-4'.
t = 0.75

Simplifying
t = 0.75
Subproblem 2
Set the factor '(3 + -1t)' equal to zero and attempt to solve:

Simplifying
3 + -1t = 0

Solving
3 + -1t = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1t = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1t = 0 + -3
-1t = 0 + -3

Combine like terms: 0 + -3 = -3
-1t = -3

Divide each side by '-1'.
t = 3

Simplifying
t = 3
Solution
t = {0.75, 3}