65=65-10t-16t^2

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Solution for 65=65-10t-16t^2 equation:


Simplifying
65 = 65 + -10t + -16t2

Add '-65' to each side of the equation.
65 + -65 = 65 + -10t + -65 + -16t2

Combine like terms: 65 + -65 = 0
0 = 65 + -10t + -65 + -16t2

Reorder the terms:
0 = 65 + -65 + -10t + -16t2

Combine like terms: 65 + -65 = 0
0 = 0 + -10t + -16t2
0 = -10t + -16t2

Solving
0 = -10t + -16t2

Solving for variable 't'.
Remove the zero:
10t + 16t2 = -10t + -16t2 + 10t + 16t2

Reorder the terms:
10t + 16t2 = -10t + 10t + -16t2 + 16t2

Combine like terms: -10t + 10t = 0
10t + 16t2 = 0 + -16t2 + 16t2
10t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
10t + 16t2 = 0

Factor out the Greatest Common Factor (GCF), '2t'.
2t(5 + 8t) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 't' equal to zero and attempt to solve: Simplifying t = 0 Solving t = 0 Move all terms containing t to the left, all other terms to the right. Simplifying t = 0

Subproblem 2

Set the factor '(5 + 8t)' equal to zero and attempt to solve: Simplifying 5 + 8t = 0 Solving 5 + 8t = 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 + 8t = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 8t = 0 + -5 8t = 0 + -5 Combine like terms: 0 + -5 = -5 8t = -5 Divide each side by '8'. t = -0.625 Simplifying t = -0.625

Solution

t = {0, -0.625}

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