8x^2+16x=1

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


Simplifying
8x2 + 16x = 1

Reorder the terms:
16x + 8x2 = 1

Solving
16x + 8x2 = 1

Solving for variable 'x'.

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

Combine like terms: 1 + -1 = 0
-1 + 16x + 8x2 = 0

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

Divide each side by '8'.
-0.125 + 2x + x2 = 0

Move the constant term to the right:

Add '0.125' to each side of the equation.
-0.125 + 2x + 0.125 + x2 = 0 + 0.125

Reorder the terms:
-0.125 + 0.125 + 2x + x2 = 0 + 0.125

Combine like terms: -0.125 + 0.125 = 0.000
0.000 + 2x + x2 = 0 + 0.125
2x + x2 = 0 + 0.125

Combine like terms: 0 + 0.125 = 0.125
2x + x2 = 0.125

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.125 + 1

Reorder the terms:
1 + 2x + x2 = 0.125 + 1

Combine like terms: 0.125 + 1 = 1.125
1 + 2x + x2 = 1.125

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.125

Calculate the square root of the right side: 1.060660172

Break this problem into two subproblems by setting 
(x + 1) equal to 1.060660172 and -1.060660172.

Subproblem 1

x + 1 = 1.060660172 Simplifying x + 1 = 1.060660172 Reorder the terms: 1 + x = 1.060660172 Solving 1 + x = 1.060660172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.060660172 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.060660172 + -1 x = 1.060660172 + -1 Combine like terms: 1.060660172 + -1 = 0.060660172 x = 0.060660172 Simplifying x = 0.060660172

Subproblem 2

x + 1 = -1.060660172 Simplifying x + 1 = -1.060660172 Reorder the terms: 1 + x = -1.060660172 Solving 1 + x = -1.060660172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.060660172 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.060660172 + -1 x = -1.060660172 + -1 Combine like terms: -1.060660172 + -1 = -2.060660172 x = -2.060660172 Simplifying x = -2.060660172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.060660172, -2.060660172}

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