82(0.006888-x^2)=2x

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Solution for 82(0.006888-x^2)=2x equation:


Simplifying
82(0.006888 + -1x2) = 2x
(0.006888 * 82 + -1x2 * 82) = 2x
(0.564816 + -82x2) = 2x

Solving
0.564816 + -82x2 = 2x

Solving for variable 'x'.

Reorder the terms:
0.564816 + -2x + -82x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
0.564816 + -2x + -82x2 = 0

Begin completing the square.  Divide all terms by
-82 the coefficient of the squared term: 

Divide each side by '-82'.
-0.006888 + 0.0243902439x + x2 = 0

Move the constant term to the right:

Add '0.006888' to each side of the equation.
-0.006888 + 0.0243902439x + 0.006888 + x2 = 0 + 0.006888

Reorder the terms:
-0.006888 + 0.006888 + 0.0243902439x + x2 = 0 + 0.006888

Combine like terms: -0.006888 + 0.006888 = 0.000000
0.000000 + 0.0243902439x + x2 = 0 + 0.006888
0.0243902439x + x2 = 0 + 0.006888

Combine like terms: 0 + 0.006888 = 0.006888
0.0243902439x + x2 = 0.006888

The x term is 0.0243902439x.  Take half its coefficient (0.01219512195).
Square it (0.0001487209994) and add it to both sides.

Add '0.0001487209994' to each side of the equation.
0.0243902439x + 0.0001487209994 + x2 = 0.006888 + 0.0001487209994

Reorder the terms:
0.0001487209994 + 0.0243902439x + x2 = 0.006888 + 0.0001487209994

Combine like terms: 0.006888 + 0.0001487209994 = 0.0070367209994
0.0001487209994 + 0.0243902439x + x2 = 0.0070367209994

Factor a perfect square on the left side:
(x + 0.01219512195)(x + 0.01219512195) = 0.0070367209994

Calculate the square root of the right side: 0.083885166

Break this problem into two subproblems by setting 
(x + 0.01219512195) equal to 0.083885166 and -0.083885166.

Subproblem 1

x + 0.01219512195 = 0.083885166 Simplifying x + 0.01219512195 = 0.083885166 Reorder the terms: 0.01219512195 + x = 0.083885166 Solving 0.01219512195 + x = 0.083885166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.01219512195' to each side of the equation. 0.01219512195 + -0.01219512195 + x = 0.083885166 + -0.01219512195 Combine like terms: 0.01219512195 + -0.01219512195 = 0.00000000000 0.00000000000 + x = 0.083885166 + -0.01219512195 x = 0.083885166 + -0.01219512195 Combine like terms: 0.083885166 + -0.01219512195 = 0.07169004405 x = 0.07169004405 Simplifying x = 0.07169004405

Subproblem 2

x + 0.01219512195 = -0.083885166 Simplifying x + 0.01219512195 = -0.083885166 Reorder the terms: 0.01219512195 + x = -0.083885166 Solving 0.01219512195 + x = -0.083885166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.01219512195' to each side of the equation. 0.01219512195 + -0.01219512195 + x = -0.083885166 + -0.01219512195 Combine like terms: 0.01219512195 + -0.01219512195 = 0.00000000000 0.00000000000 + x = -0.083885166 + -0.01219512195 x = -0.083885166 + -0.01219512195 Combine like terms: -0.083885166 + -0.01219512195 = -0.09608028795 x = -0.09608028795 Simplifying x = -0.09608028795

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.07169004405, -0.09608028795}

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