x^2+12x-79=0

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Solution for x^2+12x-79=0 equation:


Simplifying
x2 + 12x + -79 = 0

Reorder the terms:
-79 + 12x + x2 = 0

Solving
-79 + 12x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '79' to each side of the equation.
-79 + 12x + 79 + x2 = 0 + 79

Reorder the terms:
-79 + 79 + 12x + x2 = 0 + 79

Combine like terms: -79 + 79 = 0
0 + 12x + x2 = 0 + 79
12x + x2 = 0 + 79

Combine like terms: 0 + 79 = 79
12x + x2 = 79

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 = 79 + 36

Reorder the terms:
36 + 12x + x2 = 79 + 36

Combine like terms: 79 + 36 = 115
36 + 12x + x2 = 115

Factor a perfect square on the left side:
(x + 6)(x + 6) = 115

Calculate the square root of the right side: 10.723805295

Break this problem into two subproblems by setting 
(x + 6) equal to 10.723805295 and -10.723805295.

Subproblem 1

x + 6 = 10.723805295 Simplifying x + 6 = 10.723805295 Reorder the terms: 6 + x = 10.723805295 Solving 6 + x = 10.723805295 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 = 10.723805295 + -6 Combine like terms: 6 + -6 = 0 0 + x = 10.723805295 + -6 x = 10.723805295 + -6 Combine like terms: 10.723805295 + -6 = 4.723805295 x = 4.723805295 Simplifying x = 4.723805295

Subproblem 2

x + 6 = -10.723805295 Simplifying x + 6 = -10.723805295 Reorder the terms: 6 + x = -10.723805295 Solving 6 + x = -10.723805295 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 = -10.723805295 + -6 Combine like terms: 6 + -6 = 0 0 + x = -10.723805295 + -6 x = -10.723805295 + -6 Combine like terms: -10.723805295 + -6 = -16.723805295 x = -16.723805295 Simplifying x = -16.723805295

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.723805295, -16.723805295}

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