-5t^2+30t-15=30

Solution for -5t^2+30t-15=30 equation:

Simplifying
-5t2 + 30t + -15 = 30

Reorder the terms:
-15 + 30t + -5t2 = 30

Solving
-15 + 30t + -5t2 = 30

Solving for variable 't'.

Reorder the terms:
-15 + -30 + 30t + -5t2 = 30 + -30

Combine like terms: -15 + -30 = -45
-45 + 30t + -5t2 = 30 + -30

Combine like terms: 30 + -30 = 0
-45 + 30t + -5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-9 + 6t + -1t2) = 0

Factor a trinomial.
5((-3 + t)(3 + -1t)) = 0

Ignore the factor 5.
Subproblem 1
Set the factor '(-3 + t)' equal to zero and attempt to solve:

Simplifying
-3 + t = 0

Solving
-3 + t = 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 + t = 0 + 3

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

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

Simplifying
t = 3
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 = {3, 3}