x^2-6+2x+120=180

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Solution for x^2-6+2x+120=180 equation:


Simplifying
x2 + -6 + 2x + 120 = 180

Reorder the terms:
-6 + 120 + 2x + x2 = 180

Combine like terms: -6 + 120 = 114
114 + 2x + x2 = 180

Solving
114 + 2x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
114 + -180 + 2x + x2 = 180 + -180

Combine like terms: 114 + -180 = -66
-66 + 2x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-66 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '66' to each side of the equation.
-66 + 2x + 66 + x2 = 0 + 66

Reorder the terms:
-66 + 66 + 2x + x2 = 0 + 66

Combine like terms: -66 + 66 = 0
0 + 2x + x2 = 0 + 66
2x + x2 = 0 + 66

Combine like terms: 0 + 66 = 66
2x + x2 = 66

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 66 + 1

Reorder the terms:
1 + 2x + x2 = 66 + 1

Combine like terms: 66 + 1 = 67
1 + 2x + x2 = 67

Factor a perfect square on the left side:
(x + 1)(x + 1) = 67

Calculate the square root of the right side: 8.185352772

Break this problem into two subproblems by setting 
(x + 1) equal to 8.185352772 and -8.185352772.

Subproblem 1

x + 1 = 8.185352772 Simplifying x + 1 = 8.185352772 Reorder the terms: 1 + x = 8.185352772 Solving 1 + x = 8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 8.185352772 + -1 Combine like terms: 1 + -1 = 0 0 + x = 8.185352772 + -1 x = 8.185352772 + -1 Combine like terms: 8.185352772 + -1 = 7.185352772 x = 7.185352772 Simplifying x = 7.185352772

Subproblem 2

x + 1 = -8.185352772 Simplifying x + 1 = -8.185352772 Reorder the terms: 1 + x = -8.185352772 Solving 1 + x = -8.185352772 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -8.185352772 + -1 Combine like terms: 1 + -1 = 0 0 + x = -8.185352772 + -1 x = -8.185352772 + -1 Combine like terms: -8.185352772 + -1 = -9.185352772 x = -9.185352772 Simplifying x = -9.185352772

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.185352772, -9.185352772}

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