x^2+4x-1728=0

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Solution for x^2+4x-1728=0 equation:


Simplifying
x2 + 4x + -1728 = 0

Reorder the terms:
-1728 + 4x + x2 = 0

Solving
-1728 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1728' to each side of the equation.
-1728 + 4x + 1728 + x2 = 0 + 1728

Reorder the terms:
-1728 + 1728 + 4x + x2 = 0 + 1728

Combine like terms: -1728 + 1728 = 0
0 + 4x + x2 = 0 + 1728
4x + x2 = 0 + 1728

Combine like terms: 0 + 1728 = 1728
4x + x2 = 1728

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 = 1728 + 4

Reorder the terms:
4 + 4x + x2 = 1728 + 4

Combine like terms: 1728 + 4 = 1732
4 + 4x + x2 = 1732

Factor a perfect square on the left side:
(x + 2)(x + 2) = 1732

Calculate the square root of the right side: 41.617304093

Break this problem into two subproblems by setting 
(x + 2) equal to 41.617304093 and -41.617304093.

Subproblem 1

x + 2 = 41.617304093 Simplifying x + 2 = 41.617304093 Reorder the terms: 2 + x = 41.617304093 Solving 2 + x = 41.617304093 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 = 41.617304093 + -2 Combine like terms: 2 + -2 = 0 0 + x = 41.617304093 + -2 x = 41.617304093 + -2 Combine like terms: 41.617304093 + -2 = 39.617304093 x = 39.617304093 Simplifying x = 39.617304093

Subproblem 2

x + 2 = -41.617304093 Simplifying x + 2 = -41.617304093 Reorder the terms: 2 + x = -41.617304093 Solving 2 + x = -41.617304093 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 = -41.617304093 + -2 Combine like terms: 2 + -2 = 0 0 + x = -41.617304093 + -2 x = -41.617304093 + -2 Combine like terms: -41.617304093 + -2 = -43.617304093 x = -43.617304093 Simplifying x = -43.617304093

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.617304093, -43.617304093}

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