75=40t-5t^2

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Solution for 75=40t-5t^2 equation:


Simplifying
75 = 40t + -5t2

Solving
75 = 40t + -5t2

Solving for variable 't'.

Reorder the terms:
75 + -40t + 5t2 = 40t + -40t + -5t2 + 5t2

Combine like terms: 40t + -40t = 0
75 + -40t + 5t2 = 0 + -5t2 + 5t2
75 + -40t + 5t2 = -5t2 + 5t2

Combine like terms: -5t2 + 5t2 = 0
75 + -40t + 5t2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(15 + -8t + t2) = 0

Factor a trinomial.
5((3 + -1t)(5 + -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 '(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

Solution

t = {3, 5}

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