12x^2-7x-6=0

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Solution for 12x^2-7x-6=0 equation:


Simplifying
12x2 + -7x + -6 = 0

Reorder the terms:
-6 + -7x + 12x2 = 0

Solving
-6 + -7x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.5 + -0.5833333333x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.5833333333x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.5833333333x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.5833333333x + x2 = 0 + 0.5
-0.5833333333x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.5833333333x + x2 = 0.5

The x term is -0.5833333333x.  Take half its coefficient (-0.2916666667).
Square it (0.08506944446) and add it to both sides.

Add '0.08506944446' to each side of the equation.
-0.5833333333x + 0.08506944446 + x2 = 0.5 + 0.08506944446

Reorder the terms:
0.08506944446 + -0.5833333333x + x2 = 0.5 + 0.08506944446

Combine like terms: 0.5 + 0.08506944446 = 0.58506944446
0.08506944446 + -0.5833333333x + x2 = 0.58506944446

Factor a perfect square on the left side:
(x + -0.2916666667)(x + -0.2916666667) = 0.58506944446

Calculate the square root of the right side: 0.764898323

Break this problem into two subproblems by setting 
(x + -0.2916666667) equal to 0.764898323 and -0.764898323.

Subproblem 1

x + -0.2916666667 = 0.764898323 Simplifying x + -0.2916666667 = 0.764898323 Reorder the terms: -0.2916666667 + x = 0.764898323 Solving -0.2916666667 + x = 0.764898323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = 0.764898323 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = 0.764898323 + 0.2916666667 x = 0.764898323 + 0.2916666667 Combine like terms: 0.764898323 + 0.2916666667 = 1.0565649897 x = 1.0565649897 Simplifying x = 1.0565649897

Subproblem 2

x + -0.2916666667 = -0.764898323 Simplifying x + -0.2916666667 = -0.764898323 Reorder the terms: -0.2916666667 + x = -0.764898323 Solving -0.2916666667 + x = -0.764898323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = -0.764898323 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = -0.764898323 + 0.2916666667 x = -0.764898323 + 0.2916666667 Combine like terms: -0.764898323 + 0.2916666667 = -0.4732316563 x = -0.4732316563 Simplifying x = -0.4732316563

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.0565649897, -0.4732316563}

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