5t^2+12.5t-136=0

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Solution for 5t^2+12.5t-136=0 equation:


Simplifying
5t2 + 12.5t + -136 = 0

Reorder the terms:
-136 + 12.5t + 5t2 = 0

Solving
-136 + 12.5t + 5t2 = 0

Solving for variable 't'.

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

Divide each side by '5'.
-27.2 + 2.5t + t2 = 0

Move the constant term to the right:

Add '27.2' to each side of the equation.
-27.2 + 2.5t + 27.2 + t2 = 0 + 27.2

Reorder the terms:
-27.2 + 27.2 + 2.5t + t2 = 0 + 27.2

Combine like terms: -27.2 + 27.2 = 0.0
0.0 + 2.5t + t2 = 0 + 27.2
2.5t + t2 = 0 + 27.2

Combine like terms: 0 + 27.2 = 27.2
2.5t + t2 = 27.2

The t term is 2.5t.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5t + 1.5625 + t2 = 27.2 + 1.5625

Reorder the terms:
1.5625 + 2.5t + t2 = 27.2 + 1.5625

Combine like terms: 27.2 + 1.5625 = 28.7625
1.5625 + 2.5t + t2 = 28.7625

Factor a perfect square on the left side:
(t + 1.25)(t + 1.25) = 28.7625

Calculate the square root of the right side: 5.363068152

Break this problem into two subproblems by setting 
(t + 1.25) equal to 5.363068152 and -5.363068152.

Subproblem 1

t + 1.25 = 5.363068152 Simplifying t + 1.25 = 5.363068152 Reorder the terms: 1.25 + t = 5.363068152 Solving 1.25 + t = 5.363068152 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + t = 5.363068152 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + t = 5.363068152 + -1.25 t = 5.363068152 + -1.25 Combine like terms: 5.363068152 + -1.25 = 4.113068152 t = 4.113068152 Simplifying t = 4.113068152

Subproblem 2

t + 1.25 = -5.363068152 Simplifying t + 1.25 = -5.363068152 Reorder the terms: 1.25 + t = -5.363068152 Solving 1.25 + t = -5.363068152 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + t = -5.363068152 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + t = -5.363068152 + -1.25 t = -5.363068152 + -1.25 Combine like terms: -5.363068152 + -1.25 = -6.613068152 t = -6.613068152 Simplifying t = -6.613068152

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.113068152, -6.613068152}

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