2t^2-t-12=0

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Solution for 2t^2-t-12=0 equation:


Simplifying
2t2 + -1t + -12 = 0

Reorder the terms:
-12 + -1t + 2t2 = 0

Solving
-12 + -1t + 2t2 = 0

Solving for variable 't'.

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

Divide each side by '2'.
-6 + -0.5t + t2 = 0

Move the constant term to the right:

Add '6' to each side of the equation.
-6 + -0.5t + 6 + t2 = 0 + 6

Reorder the terms:
-6 + 6 + -0.5t + t2 = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -0.5t + t2 = 0 + 6
-0.5t + t2 = 0 + 6

Combine like terms: 0 + 6 = 6
-0.5t + t2 = 6

The t term is -0.5t.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5t + 0.0625 + t2 = 6 + 0.0625

Reorder the terms:
0.0625 + -0.5t + t2 = 6 + 0.0625

Combine like terms: 6 + 0.0625 = 6.0625
0.0625 + -0.5t + t2 = 6.0625

Factor a perfect square on the left side:
(t + -0.25)(t + -0.25) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(t + -0.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

t + -0.25 = 2.46221445 Simplifying t + -0.25 = 2.46221445 Reorder the terms: -0.25 + t = 2.46221445 Solving -0.25 + t = 2.46221445 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + t = 2.46221445 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + t = 2.46221445 + 0.25 t = 2.46221445 + 0.25 Combine like terms: 2.46221445 + 0.25 = 2.71221445 t = 2.71221445 Simplifying t = 2.71221445

Subproblem 2

t + -0.25 = -2.46221445 Simplifying t + -0.25 = -2.46221445 Reorder the terms: -0.25 + t = -2.46221445 Solving -0.25 + t = -2.46221445 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + t = -2.46221445 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + t = -2.46221445 + 0.25 t = -2.46221445 + 0.25 Combine like terms: -2.46221445 + 0.25 = -2.21221445 t = -2.21221445 Simplifying t = -2.21221445

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.71221445, -2.21221445}

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