2x*2x-x=61

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Solution for 2x*2x-x=61 equation:


Simplifying
2x * 2x + -1x = 61

Reorder the terms for easier multiplication:
2 * 2x * x + -1x = 61

Multiply 2 * 2
4x * x + -1x = 61

Multiply x * x
4x2 + -1x = 61

Reorder the terms:
-1x + 4x2 = 61

Solving
-1x + 4x2 = 61

Solving for variable 'x'.

Reorder the terms:
-61 + -1x + 4x2 = 61 + -61

Combine like terms: 61 + -61 = 0
-61 + -1x + 4x2 = 0

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

Divide each side by '4'.
-15.25 + -0.25x + x2 = 0

Move the constant term to the right:

Add '15.25' to each side of the equation.
-15.25 + -0.25x + 15.25 + x2 = 0 + 15.25

Reorder the terms:
-15.25 + 15.25 + -0.25x + x2 = 0 + 15.25

Combine like terms: -15.25 + 15.25 = 0.00
0.00 + -0.25x + x2 = 0 + 15.25
-0.25x + x2 = 0 + 15.25

Combine like terms: 0 + 15.25 = 15.25
-0.25x + x2 = 15.25

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = 15.25 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = 15.25 + 0.015625

Combine like terms: 15.25 + 0.015625 = 15.265625
0.015625 + -0.25x + x2 = 15.265625

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = 15.265625

Calculate the square root of the right side: 3.907124902

Break this problem into two subproblems by setting 
(x + -0.125) equal to 3.907124902 and -3.907124902.

Subproblem 1

x + -0.125 = 3.907124902 Simplifying x + -0.125 = 3.907124902 Reorder the terms: -0.125 + x = 3.907124902 Solving -0.125 + x = 3.907124902 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = 3.907124902 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = 3.907124902 + 0.125 x = 3.907124902 + 0.125 Combine like terms: 3.907124902 + 0.125 = 4.032124902 x = 4.032124902 Simplifying x = 4.032124902

Subproblem 2

x + -0.125 = -3.907124902 Simplifying x + -0.125 = -3.907124902 Reorder the terms: -0.125 + x = -3.907124902 Solving -0.125 + x = -3.907124902 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + x = -3.907124902 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + x = -3.907124902 + 0.125 x = -3.907124902 + 0.125 Combine like terms: -3.907124902 + 0.125 = -3.782124902 x = -3.782124902 Simplifying x = -3.782124902

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.032124902, -3.782124902}

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