x^2+12x-20=2

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Solution for x^2+12x-20=2 equation:


Simplifying
x2 + 12x + -20 = 2

Reorder the terms:
-20 + 12x + x2 = 2

Solving
-20 + 12x + x2 = 2

Solving for variable 'x'.

Reorder the terms:
-20 + -2 + 12x + x2 = 2 + -2

Combine like terms: -20 + -2 = -22
-22 + 12x + x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-22 + 12x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '22' to each side of the equation.
-22 + 12x + 22 + x2 = 0 + 22

Reorder the terms:
-22 + 22 + 12x + x2 = 0 + 22

Combine like terms: -22 + 22 = 0
0 + 12x + x2 = 0 + 22
12x + x2 = 0 + 22

Combine like terms: 0 + 22 = 22
12x + x2 = 22

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 = 22 + 36

Reorder the terms:
36 + 12x + x2 = 22 + 36

Combine like terms: 22 + 36 = 58
36 + 12x + x2 = 58

Factor a perfect square on the left side:
(x + 6)(x + 6) = 58

Calculate the square root of the right side: 7.615773106

Break this problem into two subproblems by setting 
(x + 6) equal to 7.615773106 and -7.615773106.

Subproblem 1

x + 6 = 7.615773106 Simplifying x + 6 = 7.615773106 Reorder the terms: 6 + x = 7.615773106 Solving 6 + x = 7.615773106 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 = 7.615773106 + -6 Combine like terms: 6 + -6 = 0 0 + x = 7.615773106 + -6 x = 7.615773106 + -6 Combine like terms: 7.615773106 + -6 = 1.615773106 x = 1.615773106 Simplifying x = 1.615773106

Subproblem 2

x + 6 = -7.615773106 Simplifying x + 6 = -7.615773106 Reorder the terms: 6 + x = -7.615773106 Solving 6 + x = -7.615773106 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 = -7.615773106 + -6 Combine like terms: 6 + -6 = 0 0 + x = -7.615773106 + -6 x = -7.615773106 + -6 Combine like terms: -7.615773106 + -6 = -13.615773106 x = -13.615773106 Simplifying x = -13.615773106

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.615773106, -13.615773106}

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