x^2+3x-360=0

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Solution for x^2+3x-360=0 equation:


Simplifying
x2 + 3x + -360 = 0

Reorder the terms:
-360 + 3x + x2 = 0

Solving
-360 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '360' to each side of the equation.
-360 + 3x + 360 + x2 = 0 + 360

Reorder the terms:
-360 + 360 + 3x + x2 = 0 + 360

Combine like terms: -360 + 360 = 0
0 + 3x + x2 = 0 + 360
3x + x2 = 0 + 360

Combine like terms: 0 + 360 = 360
3x + x2 = 360

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 = 360 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 360 + 2.25

Combine like terms: 360 + 2.25 = 362.25
2.25 + 3x + x2 = 362.25

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 362.25

Calculate the square root of the right side: 19.032866311

Break this problem into two subproblems by setting 
(x + 1.5) equal to 19.032866311 and -19.032866311.

Subproblem 1

x + 1.5 = 19.032866311 Simplifying x + 1.5 = 19.032866311 Reorder the terms: 1.5 + x = 19.032866311 Solving 1.5 + x = 19.032866311 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 = 19.032866311 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 19.032866311 + -1.5 x = 19.032866311 + -1.5 Combine like terms: 19.032866311 + -1.5 = 17.532866311 x = 17.532866311 Simplifying x = 17.532866311

Subproblem 2

x + 1.5 = -19.032866311 Simplifying x + 1.5 = -19.032866311 Reorder the terms: 1.5 + x = -19.032866311 Solving 1.5 + x = -19.032866311 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 = -19.032866311 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -19.032866311 + -1.5 x = -19.032866311 + -1.5 Combine like terms: -19.032866311 + -1.5 = -20.532866311 x = -20.532866311 Simplifying x = -20.532866311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.532866311, -20.532866311}

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