8=-16t^2+120t+5

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Solution for 8=-16t^2+120t+5 equation:


Simplifying
8 = -16t2 + 120t + 5

Reorder the terms:
8 = 5 + 120t + -16t2

Solving
8 = 5 + 120t + -16t2

Solving for variable 't'.

Combine like terms: 8 + -5 = 3
3 + -120t + 16t2 = 5 + 120t + -16t2 + -5 + -120t + 16t2

Reorder the terms:
3 + -120t + 16t2 = 5 + -5 + 120t + -120t + -16t2 + 16t2

Combine like terms: 5 + -5 = 0
3 + -120t + 16t2 = 0 + 120t + -120t + -16t2 + 16t2
3 + -120t + 16t2 = 120t + -120t + -16t2 + 16t2

Combine like terms: 120t + -120t = 0
3 + -120t + 16t2 = 0 + -16t2 + 16t2
3 + -120t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
3 + -120t + 16t2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
0.1875 + -7.5t + t2 = 0

Move the constant term to the right:

Add '-0.1875' to each side of the equation.
0.1875 + -7.5t + -0.1875 + t2 = 0 + -0.1875

Reorder the terms:
0.1875 + -0.1875 + -7.5t + t2 = 0 + -0.1875

Combine like terms: 0.1875 + -0.1875 = 0.0000
0.0000 + -7.5t + t2 = 0 + -0.1875
-7.5t + t2 = 0 + -0.1875

Combine like terms: 0 + -0.1875 = -0.1875
-7.5t + t2 = -0.1875

The t term is -7.5t.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5t + 14.0625 + t2 = -0.1875 + 14.0625

Reorder the terms:
14.0625 + -7.5t + t2 = -0.1875 + 14.0625

Combine like terms: -0.1875 + 14.0625 = 13.875
14.0625 + -7.5t + t2 = 13.875

Factor a perfect square on the left side:
(t + -3.75)(t + -3.75) = 13.875

Calculate the square root of the right side: 3.724916106

Break this problem into two subproblems by setting 
(t + -3.75) equal to 3.724916106 and -3.724916106.

Subproblem 1

t + -3.75 = 3.724916106 Simplifying t + -3.75 = 3.724916106 Reorder the terms: -3.75 + t = 3.724916106 Solving -3.75 + t = 3.724916106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + t = 3.724916106 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + t = 3.724916106 + 3.75 t = 3.724916106 + 3.75 Combine like terms: 3.724916106 + 3.75 = 7.474916106 t = 7.474916106 Simplifying t = 7.474916106

Subproblem 2

t + -3.75 = -3.724916106 Simplifying t + -3.75 = -3.724916106 Reorder the terms: -3.75 + t = -3.724916106 Solving -3.75 + t = -3.724916106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + t = -3.724916106 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + t = -3.724916106 + 3.75 t = -3.724916106 + 3.75 Combine like terms: -3.724916106 + 3.75 = 0.025083894 t = 0.025083894 Simplifying t = 0.025083894

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.474916106, 0.025083894}

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