0=60+5t-5t^2

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Solution for 0=60+5t-5t^2 equation:


Simplifying
0 = 60 + 5t + -5t2

Solving
0 = 60 + 5t + -5t2

Solving for variable 't'.

Combine like terms: 0 + -60 = -60
-60 + -5t + 5t2 = 60 + 5t + -5t2 + -60 + -5t + 5t2

Reorder the terms:
-60 + -5t + 5t2 = 60 + -60 + 5t + -5t + -5t2 + 5t2

Combine like terms: 60 + -60 = 0
-60 + -5t + 5t2 = 0 + 5t + -5t + -5t2 + 5t2
-60 + -5t + 5t2 = 5t + -5t + -5t2 + 5t2

Combine like terms: 5t + -5t = 0
-60 + -5t + 5t2 = 0 + -5t2 + 5t2
-60 + -5t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-60 + -5t + 5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-12 + -1t + t2) = 0

Factor a trinomial.
5((-3 + -1t)(4 + -1t)) = 0

Ignore the factor 5.

Subproblem 1

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

Subproblem 2

Set the factor '(4 + -1t)' equal to zero and attempt to solve: Simplifying 4 + -1t = 0 Solving 4 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1t = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1t = 0 + -4 -1t = 0 + -4 Combine like terms: 0 + -4 = -4 -1t = -4 Divide each side by '-1'. t = 4 Simplifying t = 4

Solution

t = {-3, 4}

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