2x^2-2x-47=0

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Solution for 2x^2-2x-47=0 equation:


Simplifying
2x2 + -2x + -47 = 0

Reorder the terms:
-47 + -2x + 2x2 = 0

Solving
-47 + -2x + 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'.
-23.5 + -1x + x2 = 0

Move the constant term to the right:

Add '23.5' to each side of the equation.
-23.5 + -1x + 23.5 + x2 = 0 + 23.5

Reorder the terms:
-23.5 + 23.5 + -1x + x2 = 0 + 23.5

Combine like terms: -23.5 + 23.5 = 0.0
0.0 + -1x + x2 = 0 + 23.5
-1x + x2 = 0 + 23.5

Combine like terms: 0 + 23.5 = 23.5
-1x + x2 = 23.5

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 23.5 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 23.5 + 0.25

Combine like terms: 23.5 + 0.25 = 23.75
0.25 + -1x + x2 = 23.75

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 23.75

Calculate the square root of the right side: 4.873397172

Break this problem into two subproblems by setting 
(x + -0.5) equal to 4.873397172 and -4.873397172.

Subproblem 1

x + -0.5 = 4.873397172 Simplifying x + -0.5 = 4.873397172 Reorder the terms: -0.5 + x = 4.873397172 Solving -0.5 + x = 4.873397172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 4.873397172 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 4.873397172 + 0.5 x = 4.873397172 + 0.5 Combine like terms: 4.873397172 + 0.5 = 5.373397172 x = 5.373397172 Simplifying x = 5.373397172

Subproblem 2

x + -0.5 = -4.873397172 Simplifying x + -0.5 = -4.873397172 Reorder the terms: -0.5 + x = -4.873397172 Solving -0.5 + x = -4.873397172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -4.873397172 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -4.873397172 + 0.5 x = -4.873397172 + 0.5 Combine like terms: -4.873397172 + 0.5 = -4.373397172 x = -4.373397172 Simplifying x = -4.373397172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.373397172, -4.373397172}

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