5x+12x^2=162

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Solution for 5x+12x^2=162 equation:


Simplifying
5x + 12x2 = 162

Solving
5x + 12x2 = 162

Solving for variable 'x'.

Reorder the terms:
-162 + 5x + 12x2 = 162 + -162

Combine like terms: 162 + -162 = 0
-162 + 5x + 12x2 = 0

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

Divide each side by '12'.
-13.5 + 0.4166666667x + x2 = 0

Move the constant term to the right:

Add '13.5' to each side of the equation.
-13.5 + 0.4166666667x + 13.5 + x2 = 0 + 13.5

Reorder the terms:
-13.5 + 13.5 + 0.4166666667x + x2 = 0 + 13.5

Combine like terms: -13.5 + 13.5 = 0.0
0.0 + 0.4166666667x + x2 = 0 + 13.5
0.4166666667x + x2 = 0 + 13.5

Combine like terms: 0 + 13.5 = 13.5
0.4166666667x + x2 = 13.5

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 = 13.5 + 0.04340277781

Reorder the terms:
0.04340277781 + 0.4166666667x + x2 = 13.5 + 0.04340277781

Combine like terms: 13.5 + 0.04340277781 = 13.54340277781
0.04340277781 + 0.4166666667x + x2 = 13.54340277781

Factor a perfect square on the left side:
(x + 0.2083333334)(x + 0.2083333334) = 13.54340277781

Calculate the square root of the right side: 3.680136244

Break this problem into two subproblems by setting 
(x + 0.2083333334) equal to 3.680136244 and -3.680136244.

Subproblem 1

x + 0.2083333334 = 3.680136244 Simplifying x + 0.2083333334 = 3.680136244 Reorder the terms: 0.2083333334 + x = 3.680136244 Solving 0.2083333334 + x = 3.680136244 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 = 3.680136244 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = 3.680136244 + -0.2083333334 x = 3.680136244 + -0.2083333334 Combine like terms: 3.680136244 + -0.2083333334 = 3.4718029106 x = 3.4718029106 Simplifying x = 3.4718029106

Subproblem 2

x + 0.2083333334 = -3.680136244 Simplifying x + 0.2083333334 = -3.680136244 Reorder the terms: 0.2083333334 + x = -3.680136244 Solving 0.2083333334 + x = -3.680136244 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 = -3.680136244 + -0.2083333334 Combine like terms: 0.2083333334 + -0.2083333334 = 0.0000000000 0.0000000000 + x = -3.680136244 + -0.2083333334 x = -3.680136244 + -0.2083333334 Combine like terms: -3.680136244 + -0.2083333334 = -3.8884695774 x = -3.8884695774 Simplifying x = -3.8884695774

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.4718029106, -3.8884695774}

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