-x^2-4x=-62

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Solution for -x^2-4x=-62 equation:


Simplifying
-1x2 + -4x = -62

Reorder the terms:
-4x + -1x2 = -62

Solving
-4x + -1x2 = -62

Solving for variable 'x'.

Reorder the terms:
62 + -4x + -1x2 = -62 + 62

Combine like terms: -62 + 62 = 0
62 + -4x + -1x2 = 0

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

Divide each side by '-1'.
-62 + 4x + x2 = 0

Move the constant term to the right:

Add '62' to each side of the equation.
-62 + 4x + 62 + x2 = 0 + 62

Reorder the terms:
-62 + 62 + 4x + x2 = 0 + 62

Combine like terms: -62 + 62 = 0
0 + 4x + x2 = 0 + 62
4x + x2 = 0 + 62

Combine like terms: 0 + 62 = 62
4x + x2 = 62

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 62 + 4

Reorder the terms:
4 + 4x + x2 = 62 + 4

Combine like terms: 62 + 4 = 66
4 + 4x + x2 = 66

Factor a perfect square on the left side:
(x + 2)(x + 2) = 66

Calculate the square root of the right side: 8.124038405

Break this problem into two subproblems by setting 
(x + 2) equal to 8.124038405 and -8.124038405.

Subproblem 1

x + 2 = 8.124038405 Simplifying x + 2 = 8.124038405 Reorder the terms: 2 + x = 8.124038405 Solving 2 + x = 8.124038405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 8.124038405 + -2 Combine like terms: 2 + -2 = 0 0 + x = 8.124038405 + -2 x = 8.124038405 + -2 Combine like terms: 8.124038405 + -2 = 6.124038405 x = 6.124038405 Simplifying x = 6.124038405

Subproblem 2

x + 2 = -8.124038405 Simplifying x + 2 = -8.124038405 Reorder the terms: 2 + x = -8.124038405 Solving 2 + x = -8.124038405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -8.124038405 + -2 Combine like terms: 2 + -2 = 0 0 + x = -8.124038405 + -2 x = -8.124038405 + -2 Combine like terms: -8.124038405 + -2 = -10.124038405 x = -10.124038405 Simplifying x = -10.124038405

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.124038405, -10.124038405}

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