2x^2-1x-61=0

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Solution for 2x^2-1x-61=0 equation:


Simplifying
2x2 + -1x + -61 = 0

Reorder the terms:
-61 + -1x + 2x2 = 0

Solving
-61 + -1x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-30.5 + -0.5x + x2 = 0

Move the constant term to the right:

Add '30.5' to each side of the equation.
-30.5 + -0.5x + 30.5 + x2 = 0 + 30.5

Reorder the terms:
-30.5 + 30.5 + -0.5x + x2 = 0 + 30.5

Combine like terms: -30.5 + 30.5 = 0.0
0.0 + -0.5x + x2 = 0 + 30.5
-0.5x + x2 = 0 + 30.5

Combine like terms: 0 + 30.5 = 30.5
-0.5x + x2 = 30.5

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 = 30.5 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 30.5 + 0.0625

Combine like terms: 30.5 + 0.0625 = 30.5625
0.0625 + -0.5x + x2 = 30.5625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 30.5625

Calculate the square root of the right side: 5.528336097

Break this problem into two subproblems by setting 
(x + -0.25) equal to 5.528336097 and -5.528336097.

Subproblem 1

x + -0.25 = 5.528336097 Simplifying x + -0.25 = 5.528336097 Reorder the terms: -0.25 + x = 5.528336097 Solving -0.25 + x = 5.528336097 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 = 5.528336097 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 5.528336097 + 0.25 x = 5.528336097 + 0.25 Combine like terms: 5.528336097 + 0.25 = 5.778336097 x = 5.778336097 Simplifying x = 5.778336097

Subproblem 2

x + -0.25 = -5.528336097 Simplifying x + -0.25 = -5.528336097 Reorder the terms: -0.25 + x = -5.528336097 Solving -0.25 + x = -5.528336097 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 = -5.528336097 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -5.528336097 + 0.25 x = -5.528336097 + 0.25 Combine like terms: -5.528336097 + 0.25 = -5.278336097 x = -5.278336097 Simplifying x = -5.278336097

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.778336097, -5.278336097}

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