x^2+12x-876=0

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Solution for x^2+12x-876=0 equation:


Simplifying
x2 + 12x + -876 = 0

Reorder the terms:
-876 + 12x + x2 = 0

Solving
-876 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '876' to each side of the equation.
-876 + 12x + 876 + x2 = 0 + 876

Reorder the terms:
-876 + 876 + 12x + x2 = 0 + 876

Combine like terms: -876 + 876 = 0
0 + 12x + x2 = 0 + 876
12x + x2 = 0 + 876

Combine like terms: 0 + 876 = 876
12x + x2 = 876

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 876 + 36

Reorder the terms:
36 + 12x + x2 = 876 + 36

Combine like terms: 876 + 36 = 912
36 + 12x + x2 = 912

Factor a perfect square on the left side:
(x + 6)(x + 6) = 912

Calculate the square root of the right side: 30.199337741

Break this problem into two subproblems by setting 
(x + 6) equal to 30.199337741 and -30.199337741.

Subproblem 1

x + 6 = 30.199337741 Simplifying x + 6 = 30.199337741 Reorder the terms: 6 + x = 30.199337741 Solving 6 + x = 30.199337741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 30.199337741 + -6 Combine like terms: 6 + -6 = 0 0 + x = 30.199337741 + -6 x = 30.199337741 + -6 Combine like terms: 30.199337741 + -6 = 24.199337741 x = 24.199337741 Simplifying x = 24.199337741

Subproblem 2

x + 6 = -30.199337741 Simplifying x + 6 = -30.199337741 Reorder the terms: 6 + x = -30.199337741 Solving 6 + x = -30.199337741 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -30.199337741 + -6 Combine like terms: 6 + -6 = 0 0 + x = -30.199337741 + -6 x = -30.199337741 + -6 Combine like terms: -30.199337741 + -6 = -36.199337741 x = -36.199337741 Simplifying x = -36.199337741

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.199337741, -36.199337741}

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