x^2+82x-180=0

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Solution for x^2+82x-180=0 equation:


Simplifying
x2 + 82x + -180 = 0

Reorder the terms:
-180 + 82x + x2 = 0

Solving
-180 + 82x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + 82x + 180 + x2 = 0 + 180

Reorder the terms:
-180 + 180 + 82x + x2 = 0 + 180

Combine like terms: -180 + 180 = 0
0 + 82x + x2 = 0 + 180
82x + x2 = 0 + 180

Combine like terms: 0 + 180 = 180
82x + x2 = 180

The x term is 82x.  Take half its coefficient (41).
Square it (1681) and add it to both sides.

Add '1681' to each side of the equation.
82x + 1681 + x2 = 180 + 1681

Reorder the terms:
1681 + 82x + x2 = 180 + 1681

Combine like terms: 180 + 1681 = 1861
1681 + 82x + x2 = 1861

Factor a perfect square on the left side:
(x + 41)(x + 41) = 1861

Calculate the square root of the right side: 43.13930922

Break this problem into two subproblems by setting 
(x + 41) equal to 43.13930922 and -43.13930922.

Subproblem 1

x + 41 = 43.13930922 Simplifying x + 41 = 43.13930922 Reorder the terms: 41 + x = 43.13930922 Solving 41 + x = 43.13930922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-41' to each side of the equation. 41 + -41 + x = 43.13930922 + -41 Combine like terms: 41 + -41 = 0 0 + x = 43.13930922 + -41 x = 43.13930922 + -41 Combine like terms: 43.13930922 + -41 = 2.13930922 x = 2.13930922 Simplifying x = 2.13930922

Subproblem 2

x + 41 = -43.13930922 Simplifying x + 41 = -43.13930922 Reorder the terms: 41 + x = -43.13930922 Solving 41 + x = -43.13930922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-41' to each side of the equation. 41 + -41 + x = -43.13930922 + -41 Combine like terms: 41 + -41 = 0 0 + x = -43.13930922 + -41 x = -43.13930922 + -41 Combine like terms: -43.13930922 + -41 = -84.13930922 x = -84.13930922 Simplifying x = -84.13930922

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.13930922, -84.13930922}

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