16x-8x^2-3.14159265359=0

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Solution for 16x-8x^2-3.14159265359=0 equation:


Simplifying
16x + -8x2 + -3.14159265359 = 0

Reorder the terms:
-3.14159265359 + 16x + -8x2 = 0

Solving
-3.14159265359 + 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'.
0.3926990817 + -2x + x2 = 0

Move the constant term to the right:

Add '-0.3926990817' to each side of the equation.
0.3926990817 + -2x + -0.3926990817 + x2 = 0 + -0.3926990817

Reorder the terms:
0.3926990817 + -0.3926990817 + -2x + x2 = 0 + -0.3926990817

Combine like terms: 0.3926990817 + -0.3926990817 = 0.0000000000
0.0000000000 + -2x + x2 = 0 + -0.3926990817
-2x + x2 = 0 + -0.3926990817

Combine like terms: 0 + -0.3926990817 = -0.3926990817
-2x + x2 = -0.3926990817

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 = -0.3926990817 + 1

Reorder the terms:
1 + -2x + x2 = -0.3926990817 + 1

Combine like terms: -0.3926990817 + 1 = 0.6073009183
1 + -2x + x2 = 0.6073009183

Factor a perfect square on the left side:
(x + -1)(x + -1) = 0.6073009183

Calculate the square root of the right side: 0.779295142

Break this problem into two subproblems by setting 
(x + -1) equal to 0.779295142 and -0.779295142.

Subproblem 1

x + -1 = 0.779295142 Simplifying x + -1 = 0.779295142 Reorder the terms: -1 + x = 0.779295142 Solving -1 + x = 0.779295142 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 = 0.779295142 + 1 Combine like terms: -1 + 1 = 0 0 + x = 0.779295142 + 1 x = 0.779295142 + 1 Combine like terms: 0.779295142 + 1 = 1.779295142 x = 1.779295142 Simplifying x = 1.779295142

Subproblem 2

x + -1 = -0.779295142 Simplifying x + -1 = -0.779295142 Reorder the terms: -1 + x = -0.779295142 Solving -1 + x = -0.779295142 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 = -0.779295142 + 1 Combine like terms: -1 + 1 = 0 0 + x = -0.779295142 + 1 x = -0.779295142 + 1 Combine like terms: -0.779295142 + 1 = 0.220704858 x = 0.220704858 Simplifying x = 0.220704858

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.779295142, 0.220704858}

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