x(2x-1)=212

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Solution for x(2x-1)=212 equation:


Simplifying
x(2x + -1) = 212

Reorder the terms:
x(-1 + 2x) = 212
(-1 * x + 2x * x) = 212
(-1x + 2x2) = 212

Solving
-1x + 2x2 = 212

Solving for variable 'x'.

Reorder the terms:
-212 + -1x + 2x2 = 212 + -212

Combine like terms: 212 + -212 = 0
-212 + -1x + 2x2 = 0

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

Divide each side by '2'.
-106 + -0.5x + x2 = 0

Move the constant term to the right:

Add '106' to each side of the equation.
-106 + -0.5x + 106 + x2 = 0 + 106

Reorder the terms:
-106 + 106 + -0.5x + x2 = 0 + 106

Combine like terms: -106 + 106 = 0
0 + -0.5x + x2 = 0 + 106
-0.5x + x2 = 0 + 106

Combine like terms: 0 + 106 = 106
-0.5x + x2 = 106

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 = 106 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 106 + 0.0625

Combine like terms: 106 + 0.0625 = 106.0625
0.0625 + -0.5x + x2 = 106.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 106.0625

Calculate the square root of the right side: 10.298664962

Break this problem into two subproblems by setting 
(x + -0.25) equal to 10.298664962 and -10.298664962.

Subproblem 1

x + -0.25 = 10.298664962 Simplifying x + -0.25 = 10.298664962 Reorder the terms: -0.25 + x = 10.298664962 Solving -0.25 + x = 10.298664962 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 = 10.298664962 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 10.298664962 + 0.25 x = 10.298664962 + 0.25 Combine like terms: 10.298664962 + 0.25 = 10.548664962 x = 10.548664962 Simplifying x = 10.548664962

Subproblem 2

x + -0.25 = -10.298664962 Simplifying x + -0.25 = -10.298664962 Reorder the terms: -0.25 + x = -10.298664962 Solving -0.25 + x = -10.298664962 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 = -10.298664962 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -10.298664962 + 0.25 x = -10.298664962 + 0.25 Combine like terms: -10.298664962 + 0.25 = -10.048664962 x = -10.048664962 Simplifying x = -10.048664962

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.548664962, -10.048664962}

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