(x-2)x=180

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Solution for (x-2)x=180 equation:


Simplifying
(x + -2) * x = 180

Reorder the terms:
(-2 + x) * x = 180

Reorder the terms for easier multiplication:
x(-2 + x) = 180
(-2 * x + x * x) = 180
(-2x + x2) = 180

Solving
-2x + x2 = 180

Solving for variable 'x'.

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

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

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + -2x + 180 + x2 = 0 + 180

Reorder the terms:
-180 + 180 + -2x + x2 = 0 + 180

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

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

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 = 180 + 1

Reorder the terms:
1 + -2x + x2 = 180 + 1

Combine like terms: 180 + 1 = 181
1 + -2x + x2 = 181

Factor a perfect square on the left side:
(x + -1)(x + -1) = 181

Calculate the square root of the right side: 13.453624047

Break this problem into two subproblems by setting 
(x + -1) equal to 13.453624047 and -13.453624047.

Subproblem 1

x + -1 = 13.453624047 Simplifying x + -1 = 13.453624047 Reorder the terms: -1 + x = 13.453624047 Solving -1 + x = 13.453624047 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 = 13.453624047 + 1 Combine like terms: -1 + 1 = 0 0 + x = 13.453624047 + 1 x = 13.453624047 + 1 Combine like terms: 13.453624047 + 1 = 14.453624047 x = 14.453624047 Simplifying x = 14.453624047

Subproblem 2

x + -1 = -13.453624047 Simplifying x + -1 = -13.453624047 Reorder the terms: -1 + x = -13.453624047 Solving -1 + x = -13.453624047 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 = -13.453624047 + 1 Combine like terms: -1 + 1 = 0 0 + x = -13.453624047 + 1 x = -13.453624047 + 1 Combine like terms: -13.453624047 + 1 = -12.453624047 x = -12.453624047 Simplifying x = -12.453624047

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.453624047, -12.453624047}

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