12x*x+5x+4=125

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Solution for 12x*x+5x+4=125 equation:


Simplifying
12x * x + 5x + 4 = 125

Multiply x * x
12x2 + 5x + 4 = 125

Reorder the terms:
4 + 5x + 12x2 = 125

Solving
4 + 5x + 12x2 = 125

Solving for variable 'x'.

Reorder the terms:
4 + -125 + 5x + 12x2 = 125 + -125

Combine like terms: 4 + -125 = -121
-121 + 5x + 12x2 = 125 + -125

Combine like terms: 125 + -125 = 0
-121 + 5x + 12x2 = 0

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

Divide each side by '12'.
-10.08333333 + 0.4166666667x + x2 = 0

Move the constant term to the right:

Add '10.08333333' to each side of the equation.
-10.08333333 + 0.4166666667x + 10.08333333 + x2 = 0 + 10.08333333

Reorder the terms:
-10.08333333 + 10.08333333 + 0.4166666667x + x2 = 0 + 10.08333333

Combine like terms: -10.08333333 + 10.08333333 = 0.00000000
0.00000000 + 0.4166666667x + x2 = 0 + 10.08333333
0.4166666667x + x2 = 0 + 10.08333333

Combine like terms: 0 + 10.08333333 = 10.08333333
0.4166666667x + x2 = 10.08333333

The x term is 0.4166666667x.  Take half its coefficient (0.2083333334).
Square it (0.04340277781) and add it to both sides.

Add '0.04340277781' to each side of the equation.
0.4166666667x + 0.04340277781 + x2 = 10.08333333 + 0.04340277781

Reorder the terms:
0.04340277781 + 0.4166666667x + x2 = 10.08333333 + 0.04340277781

Combine like terms: 10.08333333 + 0.04340277781 = 10.12673610781
0.04340277781 + 0.4166666667x + x2 = 10.12673610781

Factor a perfect square on the left side:
(x + 0.2083333334)(x + 0.2083333334) = 10.12673610781

Calculate the square root of the right side: 3.182253307

Break this problem into two subproblems by setting 
(x + 0.2083333334) equal to 3.182253307 and -3.182253307.

Subproblem 1

x + 0.2083333334 = 3.182253307 Simplifying x + 0.2083333334 = 3.182253307 Reorder the terms: 0.2083333334 + x = 3.182253307 Solving 0.2083333334 + x = 3.182253307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + x = 3.182253307 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = 3.182253307 + -0.2083333334 x = 3.182253307 + -0.2083333334 Combine like terms: 3.182253307 + -0.2083333334 = 2.9739199736 x = 2.9739199736 Simplifying x = 2.9739199736

Subproblem 2

x + 0.2083333334 = -3.182253307 Simplifying x + 0.2083333334 = -3.182253307 Reorder the terms: 0.2083333334 + x = -3.182253307 Solving 0.2083333334 + x = -3.182253307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2083333334' to each side of the equation. 0.2083333334 + -0.2083333334 + x = -3.182253307 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = -3.182253307 + -0.2083333334 x = -3.182253307 + -0.2083333334 Combine like terms: -3.182253307 + -0.2083333334 = -3.3905866404 x = -3.3905866404 Simplifying x = -3.3905866404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.9739199736, -3.3905866404}

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