-2x+67=x^2-4x-4

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Solution for -2x+67=x^2-4x-4 equation:


Simplifying
-2x + 67 = x2 + -4x + -4

Reorder the terms:
67 + -2x = x2 + -4x + -4

Reorder the terms:
67 + -2x = -4 + -4x + x2

Solving
67 + -2x = -4 + -4x + x2

Solving for variable 'x'.

Reorder the terms:
67 + 4 + -2x + 4x + -1x2 = -4 + -4x + x2 + 4 + 4x + -1x2

Combine like terms: 67 + 4 = 71
71 + -2x + 4x + -1x2 = -4 + -4x + x2 + 4 + 4x + -1x2

Combine like terms: -2x + 4x = 2x
71 + 2x + -1x2 = -4 + -4x + x2 + 4 + 4x + -1x2

Reorder the terms:
71 + 2x + -1x2 = -4 + 4 + -4x + 4x + x2 + -1x2

Combine like terms: -4 + 4 = 0
71 + 2x + -1x2 = 0 + -4x + 4x + x2 + -1x2
71 + 2x + -1x2 = -4x + 4x + x2 + -1x2

Combine like terms: -4x + 4x = 0
71 + 2x + -1x2 = 0 + x2 + -1x2
71 + 2x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
71 + 2x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-71 + -2x + x2 = 0

Move the constant term to the right:

Add '71' to each side of the equation.
-71 + -2x + 71 + x2 = 0 + 71

Reorder the terms:
-71 + 71 + -2x + x2 = 0 + 71

Combine like terms: -71 + 71 = 0
0 + -2x + x2 = 0 + 71
-2x + x2 = 0 + 71

Combine like terms: 0 + 71 = 71
-2x + x2 = 71

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 71 + 1

Reorder the terms:
1 + -2x + x2 = 71 + 1

Combine like terms: 71 + 1 = 72
1 + -2x + x2 = 72

Factor a perfect square on the left side:
(x + -1)(x + -1) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(x + -1) equal to 8.485281374 and -8.485281374.

Subproblem 1

x + -1 = 8.485281374 Simplifying x + -1 = 8.485281374 Reorder the terms: -1 + x = 8.485281374 Solving -1 + x = 8.485281374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 8.485281374 + 1 Combine like terms: -1 + 1 = 0 0 + x = 8.485281374 + 1 x = 8.485281374 + 1 Combine like terms: 8.485281374 + 1 = 9.485281374 x = 9.485281374 Simplifying x = 9.485281374

Subproblem 2

x + -1 = -8.485281374 Simplifying x + -1 = -8.485281374 Reorder the terms: -1 + x = -8.485281374 Solving -1 + x = -8.485281374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -8.485281374 + 1 Combine like terms: -1 + 1 = 0 0 + x = -8.485281374 + 1 x = -8.485281374 + 1 Combine like terms: -8.485281374 + 1 = -7.485281374 x = -7.485281374 Simplifying x = -7.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.485281374, -7.485281374}

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