x^2-2+3x+8=180

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Solution for x^2-2+3x+8=180 equation:


Simplifying
x2 + -2 + 3x + 8 = 180

Reorder the terms:
-2 + 8 + 3x + x2 = 180

Combine like terms: -2 + 8 = 6
6 + 3x + x2 = 180

Solving
6 + 3x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
6 + -180 + 3x + x2 = 180 + -180

Combine like terms: 6 + -180 = -174
-174 + 3x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-174 + 3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '174' to each side of the equation.
-174 + 3x + 174 + x2 = 0 + 174

Reorder the terms:
-174 + 174 + 3x + x2 = 0 + 174

Combine like terms: -174 + 174 = 0
0 + 3x + x2 = 0 + 174
3x + x2 = 0 + 174

Combine like terms: 0 + 174 = 174
3x + x2 = 174

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 174 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 174 + 2.25

Combine like terms: 174 + 2.25 = 176.25
2.25 + 3x + x2 = 176.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 176.25

Calculate the square root of the right side: 13.275918047

Break this problem into two subproblems by setting 
(x + 1.5) equal to 13.275918047 and -13.275918047.

Subproblem 1

x + 1.5 = 13.275918047 Simplifying x + 1.5 = 13.275918047 Reorder the terms: 1.5 + x = 13.275918047 Solving 1.5 + x = 13.275918047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 13.275918047 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 13.275918047 + -1.5 x = 13.275918047 + -1.5 Combine like terms: 13.275918047 + -1.5 = 11.775918047 x = 11.775918047 Simplifying x = 11.775918047

Subproblem 2

x + 1.5 = -13.275918047 Simplifying x + 1.5 = -13.275918047 Reorder the terms: 1.5 + x = -13.275918047 Solving 1.5 + x = -13.275918047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -13.275918047 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -13.275918047 + -1.5 x = -13.275918047 + -1.5 Combine like terms: -13.275918047 + -1.5 = -14.775918047 x = -14.775918047 Simplifying x = -14.775918047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.775918047, -14.775918047}

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