12x^2-14x-7=0

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Solution for 12x^2-14x-7=0 equation:


Simplifying
12x2 + -14x + -7 = 0

Reorder the terms:
-7 + -14x + 12x2 = 0

Solving
-7 + -14x + 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'.
-0.5833333333 + -1.166666667x + x2 = 0

Move the constant term to the right:

Add '0.5833333333' to each side of the equation.
-0.5833333333 + -1.166666667x + 0.5833333333 + x2 = 0 + 0.5833333333

Reorder the terms:
-0.5833333333 + 0.5833333333 + -1.166666667x + x2 = 0 + 0.5833333333

Combine like terms: -0.5833333333 + 0.5833333333 = 0.0000000000
0.0000000000 + -1.166666667x + x2 = 0 + 0.5833333333
-1.166666667x + x2 = 0 + 0.5833333333

Combine like terms: 0 + 0.5833333333 = 0.5833333333
-1.166666667x + x2 = 0.5833333333

The x term is -1.166666667x.  Take half its coefficient (-0.5833333335).
Square it (0.3402777780) and add it to both sides.

Add '0.3402777780' to each side of the equation.
-1.166666667x + 0.3402777780 + x2 = 0.5833333333 + 0.3402777780

Reorder the terms:
0.3402777780 + -1.166666667x + x2 = 0.5833333333 + 0.3402777780

Combine like terms: 0.5833333333 + 0.3402777780 = 0.9236111113
0.3402777780 + -1.166666667x + x2 = 0.9236111113

Factor a perfect square on the left side:
(x + -0.5833333335)(x + -0.5833333335) = 0.9236111113

Calculate the square root of the right side: 0.961046883

Break this problem into two subproblems by setting 
(x + -0.5833333335) equal to 0.961046883 and -0.961046883.

Subproblem 1

x + -0.5833333335 = 0.961046883 Simplifying x + -0.5833333335 = 0.961046883 Reorder the terms: -0.5833333335 + x = 0.961046883 Solving -0.5833333335 + x = 0.961046883 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = 0.961046883 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = 0.961046883 + 0.5833333335 x = 0.961046883 + 0.5833333335 Combine like terms: 0.961046883 + 0.5833333335 = 1.5443802165 x = 1.5443802165 Simplifying x = 1.5443802165

Subproblem 2

x + -0.5833333335 = -0.961046883 Simplifying x + -0.5833333335 = -0.961046883 Reorder the terms: -0.5833333335 + x = -0.961046883 Solving -0.5833333335 + x = -0.961046883 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = -0.961046883 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = -0.961046883 + 0.5833333335 x = -0.961046883 + 0.5833333335 Combine like terms: -0.961046883 + 0.5833333335 = -0.3777135495 x = -0.3777135495 Simplifying x = -0.3777135495

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.5443802165, -0.3777135495}

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