16x^2+8x+1=12

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Solution for 16x^2+8x+1=12 equation:


Simplifying
16x2 + 8x + 1 = 12

Reorder the terms:
1 + 8x + 16x2 = 12

Solving
1 + 8x + 16x2 = 12

Solving for variable 'x'.

Reorder the terms:
1 + -12 + 8x + 16x2 = 12 + -12

Combine like terms: 1 + -12 = -11
-11 + 8x + 16x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-11 + 8x + 16x2 = 0

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

Divide each side by '16'.
-0.6875 + 0.5x + x2 = 0

Move the constant term to the right:

Add '0.6875' to each side of the equation.
-0.6875 + 0.5x + 0.6875 + x2 = 0 + 0.6875

Reorder the terms:
-0.6875 + 0.6875 + 0.5x + x2 = 0 + 0.6875

Combine like terms: -0.6875 + 0.6875 = 0.0000
0.0000 + 0.5x + x2 = 0 + 0.6875
0.5x + x2 = 0 + 0.6875

Combine like terms: 0 + 0.6875 = 0.6875
0.5x + x2 = 0.6875

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 0.6875 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 0.6875 + 0.0625

Combine like terms: 0.6875 + 0.0625 = 0.75
0.0625 + 0.5x + x2 = 0.75

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 0.75

Calculate the square root of the right side: 0.866025404

Break this problem into two subproblems by setting 
(x + 0.25) equal to 0.866025404 and -0.866025404.

Subproblem 1

x + 0.25 = 0.866025404 Simplifying x + 0.25 = 0.866025404 Reorder the terms: 0.25 + x = 0.866025404 Solving 0.25 + x = 0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 0.866025404 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 0.866025404 + -0.25 x = 0.866025404 + -0.25 Combine like terms: 0.866025404 + -0.25 = 0.616025404 x = 0.616025404 Simplifying x = 0.616025404

Subproblem 2

x + 0.25 = -0.866025404 Simplifying x + 0.25 = -0.866025404 Reorder the terms: 0.25 + x = -0.866025404 Solving 0.25 + x = -0.866025404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -0.866025404 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -0.866025404 + -0.25 x = -0.866025404 + -0.25 Combine like terms: -0.866025404 + -0.25 = -1.116025404 x = -1.116025404 Simplifying x = -1.116025404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.616025404, -1.116025404}

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