325=90t-5t^2

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Solution for 325=90t-5t^2 equation:


Simplifying
325 = 90t + -5t2

Solving
325 = 90t + -5t2

Solving for variable 't'.

Reorder the terms:
325 + -90t + 5t2 = 90t + -90t + -5t2 + 5t2

Combine like terms: 90t + -90t = 0
325 + -90t + 5t2 = 0 + -5t2 + 5t2
325 + -90t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
325 + -90t + 5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(65 + -18t + t2) = 0

Factor a trinomial.
5((5 + -1t)(13 + -1t)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(5 + -1t)' equal to zero and attempt to solve: Simplifying 5 + -1t = 0 Solving 5 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1t = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1t = 0 + -5 -1t = 0 + -5 Combine like terms: 0 + -5 = -5 -1t = -5 Divide each side by '-1'. t = 5 Simplifying t = 5

Subproblem 2

Set the factor '(13 + -1t)' equal to zero and attempt to solve: Simplifying 13 + -1t = 0 Solving 13 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + -1t = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1t = 0 + -13 -1t = 0 + -13 Combine like terms: 0 + -13 = -13 -1t = -13 Divide each side by '-1'. t = 13 Simplifying t = 13

Solution

t = {5, 13}

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