12x^2=13-3x

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Solution for 12x^2=13-3x equation:


Simplifying
12x2 = 13 + -3x

Solving
12x2 = 13 + -3x

Solving for variable 'x'.

Reorder the terms:
-13 + 3x + 12x2 = 13 + -3x + -13 + 3x

Reorder the terms:
-13 + 3x + 12x2 = 13 + -13 + -3x + 3x

Combine like terms: 13 + -13 = 0
-13 + 3x + 12x2 = 0 + -3x + 3x
-13 + 3x + 12x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
-13 + 3x + 12x2 = 0

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

Divide each side by '12'.
-1.083333333 + 0.25x + x2 = 0

Move the constant term to the right:

Add '1.083333333' to each side of the equation.
-1.083333333 + 0.25x + 1.083333333 + x2 = 0 + 1.083333333

Reorder the terms:
-1.083333333 + 1.083333333 + 0.25x + x2 = 0 + 1.083333333

Combine like terms: -1.083333333 + 1.083333333 = 0.000000000
0.000000000 + 0.25x + x2 = 0 + 1.083333333
0.25x + x2 = 0 + 1.083333333

Combine like terms: 0 + 1.083333333 = 1.083333333
0.25x + x2 = 1.083333333

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 1.083333333 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 1.083333333 + 0.015625

Combine like terms: 1.083333333 + 0.015625 = 1.098958333
0.015625 + 0.25x + x2 = 1.098958333

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 1.098958333

Calculate the square root of the right side: 1.048312135

Break this problem into two subproblems by setting 
(x + 0.125) equal to 1.048312135 and -1.048312135.

Subproblem 1

x + 0.125 = 1.048312135 Simplifying x + 0.125 = 1.048312135 Reorder the terms: 0.125 + x = 1.048312135 Solving 0.125 + x = 1.048312135 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 1.048312135 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 1.048312135 + -0.125 x = 1.048312135 + -0.125 Combine like terms: 1.048312135 + -0.125 = 0.923312135 x = 0.923312135 Simplifying x = 0.923312135

Subproblem 2

x + 0.125 = -1.048312135 Simplifying x + 0.125 = -1.048312135 Reorder the terms: 0.125 + x = -1.048312135 Solving 0.125 + x = -1.048312135 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -1.048312135 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -1.048312135 + -0.125 x = -1.048312135 + -0.125 Combine like terms: -1.048312135 + -0.125 = -1.173312135 x = -1.173312135 Simplifying x = -1.173312135

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.923312135, -1.173312135}

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