12x^2+6x-7=0

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


Simplifying
12x2 + 6x + -7 = 0

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

Solving
-7 + 6x + 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 + 0.5x + x2 = 0

Move the constant term to the right:

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

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

Combine like terms: -0.5833333333 + 0.5833333333 = 0.0000000000
0.0000000000 + 0.5x + x2 = 0 + 0.5833333333
0.5x + x2 = 0 + 0.5833333333

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

The x term is 0.5x.  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.
0.5x + 0.0625 + x2 = 0.5833333333 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 0.5833333333 + 0.0625

Combine like terms: 0.5833333333 + 0.0625 = 0.6458333333
0.0625 + 0.5x + x2 = 0.6458333333

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 0.6458333333

Calculate the square root of the right side: 0.803637563

Break this problem into two subproblems by setting 
(x + 0.25) equal to 0.803637563 and -0.803637563.

Subproblem 1

x + 0.25 = 0.803637563 Simplifying x + 0.25 = 0.803637563 Reorder the terms: 0.25 + x = 0.803637563 Solving 0.25 + x = 0.803637563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.803637563 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.803637563 + -0.25 x = 0.803637563 + -0.25 Combine like terms: 0.803637563 + -0.25 = 0.553637563 x = 0.553637563 Simplifying x = 0.553637563

Subproblem 2

x + 0.25 = -0.803637563 Simplifying x + 0.25 = -0.803637563 Reorder the terms: 0.25 + x = -0.803637563 Solving 0.25 + x = -0.803637563 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.803637563 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.803637563 + -0.25 x = -0.803637563 + -0.25 Combine like terms: -0.803637563 + -0.25 = -1.053637563 x = -1.053637563 Simplifying x = -1.053637563

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.553637563, -1.053637563}

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