80=-5t^2-5t+180

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Solution for 80=-5t^2-5t+180 equation:


Simplifying
80 = -5t2 + -5t + 180

Reorder the terms:
80 = 180 + -5t + -5t2

Solving
80 = 180 + -5t + -5t2

Solving for variable 't'.

Combine like terms: 80 + -180 = -100
-100 + 5t + 5t2 = 180 + -5t + -5t2 + -180 + 5t + 5t2

Reorder the terms:
-100 + 5t + 5t2 = 180 + -180 + -5t + 5t + -5t2 + 5t2

Combine like terms: 180 + -180 = 0
-100 + 5t + 5t2 = 0 + -5t + 5t + -5t2 + 5t2
-100 + 5t + 5t2 = -5t + 5t + -5t2 + 5t2

Combine like terms: -5t + 5t = 0
-100 + 5t + 5t2 = 0 + -5t2 + 5t2
-100 + 5t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
-100 + 5t + 5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-20 + t + t2) = 0

Factor a trinomial.
5((-5 + -1t)(4 + -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 '(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 = {-5, 4}

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