0=15-32x+12x^2

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Solution for 0=15-32x+12x^2 equation:


Simplifying
0 = 15 + -32x + 12x2

Solving
0 = 15 + -32x + 12x2

Solving for variable 'x'.

Combine like terms: 0 + -15 = -15
-15 + 32x + -12x2 = 15 + -32x + 12x2 + -15 + 32x + -12x2

Reorder the terms:
-15 + 32x + -12x2 = 15 + -15 + -32x + 32x + 12x2 + -12x2

Combine like terms: 15 + -15 = 0
-15 + 32x + -12x2 = 0 + -32x + 32x + 12x2 + -12x2
-15 + 32x + -12x2 = -32x + 32x + 12x2 + -12x2

Combine like terms: -32x + 32x = 0
-15 + 32x + -12x2 = 0 + 12x2 + -12x2
-15 + 32x + -12x2 = 12x2 + -12x2

Combine like terms: 12x2 + -12x2 = 0
-15 + 32x + -12x2 = 0

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

Divide each side by '-12'.
1.25 + -2.666666667x + x2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -2.666666667x + -1.25 + x2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -2.666666667x + x2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -2.666666667x + x2 = 0 + -1.25
-2.666666667x + x2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-2.666666667x + x2 = -1.25

The x term is -2.666666667x.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667x + 1.777777780 + x2 = -1.25 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667x + x2 = -1.25 + 1.777777780

Combine like terms: -1.25 + 1.777777780 = 0.52777778
1.777777780 + -2.666666667x + x2 = 0.52777778

Factor a perfect square on the left side:
(x + -1.333333334)(x + -1.333333334) = 0.52777778

Calculate the square root of the right side: 0.726483159

Break this problem into two subproblems by setting 
(x + -1.333333334) equal to 0.726483159 and -0.726483159.

Subproblem 1

x + -1.333333334 = 0.726483159 Simplifying x + -1.333333334 = 0.726483159 Reorder the terms: -1.333333334 + x = 0.726483159 Solving -1.333333334 + x = 0.726483159 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = 0.726483159 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = 0.726483159 + 1.333333334 x = 0.726483159 + 1.333333334 Combine like terms: 0.726483159 + 1.333333334 = 2.059816493 x = 2.059816493 Simplifying x = 2.059816493

Subproblem 2

x + -1.333333334 = -0.726483159 Simplifying x + -1.333333334 = -0.726483159 Reorder the terms: -1.333333334 + x = -0.726483159 Solving -1.333333334 + x = -0.726483159 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + x = -0.726483159 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + x = -0.726483159 + 1.333333334 x = -0.726483159 + 1.333333334 Combine like terms: -0.726483159 + 1.333333334 = 0.606850175 x = 0.606850175 Simplifying x = 0.606850175

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.059816493, 0.606850175}

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