12x^2+16x=-3

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Solution for 12x^2+16x=-3 equation:


Simplifying
12x2 + 16x = -3

Reorder the terms:
16x + 12x2 = -3

Solving
16x + 12x2 = -3

Solving for variable 'x'.

Reorder the terms:
3 + 16x + 12x2 = -3 + 3

Combine like terms: -3 + 3 = 0
3 + 16x + 12x2 = 0

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

Divide each side by '12'.
0.25 + 1.333333333x + x2 = 0

Move the constant term to the right:

Add '-0.25' to each side of the equation.
0.25 + 1.333333333x + -0.25 + x2 = 0 + -0.25

Reorder the terms:
0.25 + -0.25 + 1.333333333x + x2 = 0 + -0.25

Combine like terms: 0.25 + -0.25 = 0.00
0.00 + 1.333333333x + x2 = 0 + -0.25
1.333333333x + x2 = 0 + -0.25

Combine like terms: 0 + -0.25 = -0.25
1.333333333x + x2 = -0.25

The x term is 1.333333333x.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333x + 0.4444444442 + x2 = -0.25 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333x + x2 = -0.25 + 0.4444444442

Combine like terms: -0.25 + 0.4444444442 = 0.1944444442
0.4444444442 + 1.333333333x + x2 = 0.1944444442

Factor a perfect square on the left side:
(x + 0.6666666665)(x + 0.6666666665) = 0.1944444442

Calculate the square root of the right side: 0.440958552

Break this problem into two subproblems by setting 
(x + 0.6666666665) equal to 0.440958552 and -0.440958552.

Subproblem 1

x + 0.6666666665 = 0.440958552 Simplifying x + 0.6666666665 = 0.440958552 Reorder the terms: 0.6666666665 + x = 0.440958552 Solving 0.6666666665 + x = 0.440958552 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 0.440958552 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 0.440958552 + -0.6666666665 x = 0.440958552 + -0.6666666665 Combine like terms: 0.440958552 + -0.6666666665 = -0.2257081145 x = -0.2257081145 Simplifying x = -0.2257081145

Subproblem 2

x + 0.6666666665 = -0.440958552 Simplifying x + 0.6666666665 = -0.440958552 Reorder the terms: 0.6666666665 + x = -0.440958552 Solving 0.6666666665 + x = -0.440958552 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -0.440958552 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -0.440958552 + -0.6666666665 x = -0.440958552 + -0.6666666665 Combine like terms: -0.440958552 + -0.6666666665 = -1.1076252185 x = -1.1076252185 Simplifying x = -1.1076252185

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.2257081145, -1.1076252185}

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