x^2+180x-360=0

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Solution for x^2+180x-360=0 equation:


Simplifying
x2 + 180x + -360 = 0

Reorder the terms:
-360 + 180x + x2 = 0

Solving
-360 + 180x + 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 + 180x + 360 + x2 = 0 + 360

Reorder the terms:
-360 + 360 + 180x + x2 = 0 + 360

Combine like terms: -360 + 360 = 0
0 + 180x + x2 = 0 + 360
180x + x2 = 0 + 360

Combine like terms: 0 + 360 = 360
180x + x2 = 360

The x term is 180x.  Take half its coefficient (90).
Square it (8100) and add it to both sides.

Add '8100' to each side of the equation.
180x + 8100 + x2 = 360 + 8100

Reorder the terms:
8100 + 180x + x2 = 360 + 8100

Combine like terms: 360 + 8100 = 8460
8100 + 180x + x2 = 8460

Factor a perfect square on the left side:
(x + 90)(x + 90) = 8460

Calculate the square root of the right side: 91.978258301

Break this problem into two subproblems by setting 
(x + 90) equal to 91.978258301 and -91.978258301.

Subproblem 1

x + 90 = 91.978258301 Simplifying x + 90 = 91.978258301 Reorder the terms: 90 + x = 91.978258301 Solving 90 + x = 91.978258301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + -90 + x = 91.978258301 + -90 Combine like terms: 90 + -90 = 0 0 + x = 91.978258301 + -90 x = 91.978258301 + -90 Combine like terms: 91.978258301 + -90 = 1.978258301 x = 1.978258301 Simplifying x = 1.978258301

Subproblem 2

x + 90 = -91.978258301 Simplifying x + 90 = -91.978258301 Reorder the terms: 90 + x = -91.978258301 Solving 90 + x = -91.978258301 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-90' to each side of the equation. 90 + -90 + x = -91.978258301 + -90 Combine like terms: 90 + -90 = 0 0 + x = -91.978258301 + -90 x = -91.978258301 + -90 Combine like terms: -91.978258301 + -90 = -181.978258301 x = -181.978258301 Simplifying x = -181.978258301

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.978258301, -181.978258301}

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