2(t)=-0.8t^2+24t+8

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Solution for 2(t)=-0.8t^2+24t+8 equation:


Simplifying
2(t) = -0.8t2 + 24t + 8

Reorder the terms:
2t = 8 + 24t + -0.8t2

Solving
2t = 8 + 24t + -0.8t2

Solving for variable 't'.

Reorder the terms:
-8 + 2t + -24t + 0.8t2 = 8 + 24t + -0.8t2 + -8 + -24t + 0.8t2

Combine like terms: 2t + -24t = -22t
-8 + -22t + 0.8t2 = 8 + 24t + -0.8t2 + -8 + -24t + 0.8t2

Reorder the terms:
-8 + -22t + 0.8t2 = 8 + -8 + 24t + -24t + -0.8t2 + 0.8t2

Combine like terms: 8 + -8 = 0
-8 + -22t + 0.8t2 = 0 + 24t + -24t + -0.8t2 + 0.8t2
-8 + -22t + 0.8t2 = 24t + -24t + -0.8t2 + 0.8t2

Combine like terms: 24t + -24t = 0
-8 + -22t + 0.8t2 = 0 + -0.8t2 + 0.8t2
-8 + -22t + 0.8t2 = -0.8t2 + 0.8t2

Combine like terms: -0.8t2 + 0.8t2 = 0.0
-8 + -22t + 0.8t2 = 0.0

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

Divide each side by '0.8'.
-10 + -27.5t + t2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -27.5t + 10 + t2 = 0 + 10

Reorder the terms:
-10 + 10 + -27.5t + t2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -27.5t + t2 = 0 + 10
-27.5t + t2 = 0 + 10

Combine like terms: 0 + 10 = 10
-27.5t + t2 = 10

The t term is -27.5t.  Take half its coefficient (-13.75).
Square it (189.0625) and add it to both sides.

Add '189.0625' to each side of the equation.
-27.5t + 189.0625 + t2 = 10 + 189.0625

Reorder the terms:
189.0625 + -27.5t + t2 = 10 + 189.0625

Combine like terms: 10 + 189.0625 = 199.0625
189.0625 + -27.5t + t2 = 199.0625

Factor a perfect square on the left side:
(t + -13.75)(t + -13.75) = 199.0625

Calculate the square root of the right side: 14.10895106

Break this problem into two subproblems by setting 
(t + -13.75) equal to 14.10895106 and -14.10895106.

Subproblem 1

t + -13.75 = 14.10895106 Simplifying t + -13.75 = 14.10895106 Reorder the terms: -13.75 + t = 14.10895106 Solving -13.75 + t = 14.10895106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '13.75' to each side of the equation. -13.75 + 13.75 + t = 14.10895106 + 13.75 Combine like terms: -13.75 + 13.75 = 0.00 0.00 + t = 14.10895106 + 13.75 t = 14.10895106 + 13.75 Combine like terms: 14.10895106 + 13.75 = 27.85895106 t = 27.85895106 Simplifying t = 27.85895106

Subproblem 2

t + -13.75 = -14.10895106 Simplifying t + -13.75 = -14.10895106 Reorder the terms: -13.75 + t = -14.10895106 Solving -13.75 + t = -14.10895106 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '13.75' to each side of the equation. -13.75 + 13.75 + t = -14.10895106 + 13.75 Combine like terms: -13.75 + 13.75 = 0.00 0.00 + t = -14.10895106 + 13.75 t = -14.10895106 + 13.75 Combine like terms: -14.10895106 + 13.75 = -0.35895106 t = -0.35895106 Simplifying t = -0.35895106

Solution

The solution to the problem is based on the solutions from the subproblems. t = {27.85895106, -0.35895106}

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