12t^2-15t-4t=5

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Solution for 12t^2-15t-4t=5 equation:


Simplifying
12t2 + -15t + -4t = 5

Reorder the terms:
-15t + -4t + 12t2 = 5

Combine like terms: -15t + -4t = -19t
-19t + 12t2 = 5

Solving
-19t + 12t2 = 5

Solving for variable 't'.

Reorder the terms:
-5 + -19t + 12t2 = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -19t + 12t2 = 0

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

Divide each side by '12'.
-0.4166666667 + -1.583333333t + t2 = 0

Move the constant term to the right:

Add '0.4166666667' to each side of the equation.
-0.4166666667 + -1.583333333t + 0.4166666667 + t2 = 0 + 0.4166666667

Reorder the terms:
-0.4166666667 + 0.4166666667 + -1.583333333t + t2 = 0 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + -1.583333333t + t2 = 0 + 0.4166666667
-1.583333333t + t2 = 0 + 0.4166666667

Combine like terms: 0 + 0.4166666667 = 0.4166666667
-1.583333333t + t2 = 0.4166666667

The t term is -1.583333333t.  Take half its coefficient (-0.7916666665).
Square it (0.6267361108) and add it to both sides.

Add '0.6267361108' to each side of the equation.
-1.583333333t + 0.6267361108 + t2 = 0.4166666667 + 0.6267361108

Reorder the terms:
0.6267361108 + -1.583333333t + t2 = 0.4166666667 + 0.6267361108

Combine like terms: 0.4166666667 + 0.6267361108 = 1.0434027775
0.6267361108 + -1.583333333t + t2 = 1.0434027775

Factor a perfect square on the left side:
(t + -0.7916666665)(t + -0.7916666665) = 1.0434027775

Calculate the square root of the right side: 1.021470889

Break this problem into two subproblems by setting 
(t + -0.7916666665) equal to 1.021470889 and -1.021470889.

Subproblem 1

t + -0.7916666665 = 1.021470889 Simplifying t + -0.7916666665 = 1.021470889 Reorder the terms: -0.7916666665 + t = 1.021470889 Solving -0.7916666665 + t = 1.021470889 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7916666665' to each side of the equation. -0.7916666665 + 0.7916666665 + t = 1.021470889 + 0.7916666665 Combine like terms: -0.7916666665 + 0.7916666665 = 0.0000000000 0.0000000000 + t = 1.021470889 + 0.7916666665 t = 1.021470889 + 0.7916666665 Combine like terms: 1.021470889 + 0.7916666665 = 1.8131375555 t = 1.8131375555 Simplifying t = 1.8131375555

Subproblem 2

t + -0.7916666665 = -1.021470889 Simplifying t + -0.7916666665 = -1.021470889 Reorder the terms: -0.7916666665 + t = -1.021470889 Solving -0.7916666665 + t = -1.021470889 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7916666665' to each side of the equation. -0.7916666665 + 0.7916666665 + t = -1.021470889 + 0.7916666665 Combine like terms: -0.7916666665 + 0.7916666665 = 0.0000000000 0.0000000000 + t = -1.021470889 + 0.7916666665 t = -1.021470889 + 0.7916666665 Combine like terms: -1.021470889 + 0.7916666665 = -0.2298042225 t = -0.2298042225 Simplifying t = -0.2298042225

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.8131375555, -0.2298042225}

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