0=140+60t-5t^2

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Solution for 0=140+60t-5t^2 equation:


Simplifying
0 = 140 + 60t + -5t2

Solving
0 = 140 + 60t + -5t2

Solving for variable 't'.

Combine like terms: 0 + -140 = -140
-140 + -60t + 5t2 = 140 + 60t + -5t2 + -140 + -60t + 5t2

Reorder the terms:
-140 + -60t + 5t2 = 140 + -140 + 60t + -60t + -5t2 + 5t2

Combine like terms: 140 + -140 = 0
-140 + -60t + 5t2 = 0 + 60t + -60t + -5t2 + 5t2
-140 + -60t + 5t2 = 60t + -60t + -5t2 + 5t2

Combine like terms: 60t + -60t = 0
-140 + -60t + 5t2 = 0 + -5t2 + 5t2
-140 + -60t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-140 + -60t + 5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-28 + -12t + t2) = 0

Factor a trinomial.
5((-2 + -1t)(14 + -1t)) = 0

Ignore the factor 5.

Subproblem 1

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

Subproblem 2

Set the factor '(14 + -1t)' equal to zero and attempt to solve: Simplifying 14 + -1t = 0 Solving 14 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -1t = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -1t = 0 + -14 -1t = 0 + -14 Combine like terms: 0 + -14 = -14 -1t = -14 Divide each side by '-1'. t = 14 Simplifying t = 14

Solution

t = {-2, 14}

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