14t^2+14t-15=0

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Solution for 14t^2+14t-15=0 equation:


Simplifying
14t2 + 14t + -15 = 0

Reorder the terms:
-15 + 14t + 14t2 = 0

Solving
-15 + 14t + 14t2 = 0

Solving for variable 't'.

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

Divide each side by '14'.
-1.071428571 + t + t2 = 0

Move the constant term to the right:

Add '1.071428571' to each side of the equation.
-1.071428571 + t + 1.071428571 + t2 = 0 + 1.071428571

Reorder the terms:
-1.071428571 + 1.071428571 + t + t2 = 0 + 1.071428571

Combine like terms: -1.071428571 + 1.071428571 = 0.000000000
0.000000000 + t + t2 = 0 + 1.071428571
t + t2 = 0 + 1.071428571

Combine like terms: 0 + 1.071428571 = 1.071428571
t + t2 = 1.071428571

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + t2 = 1.071428571 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + t2 = 1.071428571 + 0.25

Combine like terms: 1.071428571 + 0.25 = 1.321428571
1.25 + t2 = 1.321428571

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 1.321428571

Calculate the square root of the right side: 1.149534067

Break this problem into two subproblems by setting 
(t + 0.5) equal to 1.149534067 and -1.149534067.

Subproblem 1

t + 0.5 = 1.149534067 Simplifying t + 0.5 = 1.149534067 Reorder the terms: 0.5 + t = 1.149534067 Solving 0.5 + t = 1.149534067 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 1.149534067 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 1.149534067 + -0.5 t = 1.149534067 + -0.5 Combine like terms: 1.149534067 + -0.5 = 0.649534067 t = 0.649534067 Simplifying t = 0.649534067

Subproblem 2

t + 0.5 = -1.149534067 Simplifying t + 0.5 = -1.149534067 Reorder the terms: 0.5 + t = -1.149534067 Solving 0.5 + t = -1.149534067 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -1.149534067 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -1.149534067 + -0.5 t = -1.149534067 + -0.5 Combine like terms: -1.149534067 + -0.5 = -1.649534067 t = -1.649534067 Simplifying t = -1.649534067

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.649534067, -1.649534067}

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