x^2+24x+126=0

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Solution for x^2+24x+126=0 equation:


Simplifying
x2 + 24x + 126 = 0

Reorder the terms:
126 + 24x + x2 = 0

Solving
126 + 24x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-126' to each side of the equation.
126 + 24x + -126 + x2 = 0 + -126

Reorder the terms:
126 + -126 + 24x + x2 = 0 + -126

Combine like terms: 126 + -126 = 0
0 + 24x + x2 = 0 + -126
24x + x2 = 0 + -126

Combine like terms: 0 + -126 = -126
24x + x2 = -126

The x term is 24x.  Take half its coefficient (12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
24x + 144 + x2 = -126 + 144

Reorder the terms:
144 + 24x + x2 = -126 + 144

Combine like terms: -126 + 144 = 18
144 + 24x + x2 = 18

Factor a perfect square on the left side:
(x + 12)(x + 12) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(x + 12) equal to 4.242640687 and -4.242640687.

Subproblem 1

x + 12 = 4.242640687 Simplifying x + 12 = 4.242640687 Reorder the terms: 12 + x = 4.242640687 Solving 12 + x = 4.242640687 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = 4.242640687 + -12 Combine like terms: 12 + -12 = 0 0 + x = 4.242640687 + -12 x = 4.242640687 + -12 Combine like terms: 4.242640687 + -12 = -7.757359313 x = -7.757359313 Simplifying x = -7.757359313

Subproblem 2

x + 12 = -4.242640687 Simplifying x + 12 = -4.242640687 Reorder the terms: 12 + x = -4.242640687 Solving 12 + x = -4.242640687 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + x = -4.242640687 + -12 Combine like terms: 12 + -12 = 0 0 + x = -4.242640687 + -12 x = -4.242640687 + -12 Combine like terms: -4.242640687 + -12 = -16.242640687 x = -16.242640687 Simplifying x = -16.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-7.757359313, -16.242640687}

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