(8x^2)-16x-3=0

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Solution for (8x^2)-16x-3=0 equation:


Simplifying
(8x2) + -16x + -3 = 0

Reorder the terms:
-3 + -16x + (8x2) = 0

Solving
-3 + -16x + (8x2) = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-0.375 + -2x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + -2x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + -2x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + -2x + x2 = 0 + 0.375
-2x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
-2x + x2 = 0.375

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 = 0.375 + 1

Reorder the terms:
1 + -2x + x2 = 0.375 + 1

Combine like terms: 0.375 + 1 = 1.375
1 + -2x + x2 = 1.375

Factor a perfect square on the left side:
((x) + -1)((x) + -1) = 1.375

Calculate the square root of the right side: 1.17260394

Break this problem into two subproblems by setting 
((x) + -1) equal to 1.17260394 and -1.17260394.

Subproblem 1

(x) + -1 = 1.17260394 Simplifying (x) + -1 = 1.17260394 x + -1 = 1.17260394 Reorder the terms: -1 + x = 1.17260394 Solving -1 + x = 1.17260394 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 = 1.17260394 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.17260394 + 1 x = 1.17260394 + 1 Combine like terms: 1.17260394 + 1 = 2.17260394 x = 2.17260394 Simplifying x = 2.17260394

Subproblem 2

(x) + -1 = -1.17260394 Simplifying (x) + -1 = -1.17260394 x + -1 = -1.17260394 Reorder the terms: -1 + x = -1.17260394 Solving -1 + x = -1.17260394 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 = -1.17260394 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.17260394 + 1 x = -1.17260394 + 1 Combine like terms: -1.17260394 + 1 = -0.17260394 x = -0.17260394 Simplifying x = -0.17260394

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.17260394, -0.17260394}

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