0=x^2+4x-496

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Solution for 0=x^2+4x-496 equation:


Simplifying
0 = x2 + 4x + -496

Reorder the terms:
0 = -496 + 4x + x2

Solving
0 = -496 + 4x + x2

Solving for variable 'x'.

Combine like terms: 0 + 496 = 496
496 + -4x + -1x2 = -496 + 4x + x2 + 496 + -4x + -1x2

Reorder the terms:
496 + -4x + -1x2 = -496 + 496 + 4x + -4x + x2 + -1x2

Combine like terms: -496 + 496 = 0
496 + -4x + -1x2 = 0 + 4x + -4x + x2 + -1x2
496 + -4x + -1x2 = 4x + -4x + x2 + -1x2

Combine like terms: 4x + -4x = 0
496 + -4x + -1x2 = 0 + x2 + -1x2
496 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
496 + -4x + -1x2 = 0

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

Divide each side by '-1'.
-496 + 4x + x2 = 0

Move the constant term to the right:

Add '496' to each side of the equation.
-496 + 4x + 496 + x2 = 0 + 496

Reorder the terms:
-496 + 496 + 4x + x2 = 0 + 496

Combine like terms: -496 + 496 = 0
0 + 4x + x2 = 0 + 496
4x + x2 = 0 + 496

Combine like terms: 0 + 496 = 496
4x + x2 = 496

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 = 496 + 4

Reorder the terms:
4 + 4x + x2 = 496 + 4

Combine like terms: 496 + 4 = 500
4 + 4x + x2 = 500

Factor a perfect square on the left side:
(x + 2)(x + 2) = 500

Calculate the square root of the right side: 22.360679775

Break this problem into two subproblems by setting 
(x + 2) equal to 22.360679775 and -22.360679775.

Subproblem 1

x + 2 = 22.360679775 Simplifying x + 2 = 22.360679775 Reorder the terms: 2 + x = 22.360679775 Solving 2 + x = 22.360679775 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 = 22.360679775 + -2 Combine like terms: 2 + -2 = 0 0 + x = 22.360679775 + -2 x = 22.360679775 + -2 Combine like terms: 22.360679775 + -2 = 20.360679775 x = 20.360679775 Simplifying x = 20.360679775

Subproblem 2

x + 2 = -22.360679775 Simplifying x + 2 = -22.360679775 Reorder the terms: 2 + x = -22.360679775 Solving 2 + x = -22.360679775 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 = -22.360679775 + -2 Combine like terms: 2 + -2 = 0 0 + x = -22.360679775 + -2 x = -22.360679775 + -2 Combine like terms: -22.360679775 + -2 = -24.360679775 x = -24.360679775 Simplifying x = -24.360679775

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.360679775, -24.360679775}

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