2x+x(x+8)=180

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Solution for 2x+x(x+8)=180 equation:


Simplifying
2x + x(x + 8) = 180

Reorder the terms:
2x + x(8 + x) = 180
2x + (8 * x + x * x) = 180
2x + (8x + x2) = 180

Combine like terms: 2x + 8x = 10x
10x + x2 = 180

Solving
10x + x2 = 180

Solving for variable 'x'.

Reorder the terms:
-180 + 10x + x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-180 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '180' to each side of the equation.
-180 + 10x + 180 + x2 = 0 + 180

Reorder the terms:
-180 + 180 + 10x + x2 = 0 + 180

Combine like terms: -180 + 180 = 0
0 + 10x + x2 = 0 + 180
10x + x2 = 0 + 180

Combine like terms: 0 + 180 = 180
10x + x2 = 180

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 180 + 25

Reorder the terms:
25 + 10x + x2 = 180 + 25

Combine like terms: 180 + 25 = 205
25 + 10x + x2 = 205

Factor a perfect square on the left side:
(x + 5)(x + 5) = 205

Calculate the square root of the right side: 14.317821063

Break this problem into two subproblems by setting 
(x + 5) equal to 14.317821063 and -14.317821063.

Subproblem 1

x + 5 = 14.317821063 Simplifying x + 5 = 14.317821063 Reorder the terms: 5 + x = 14.317821063 Solving 5 + x = 14.317821063 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 14.317821063 + -5 Combine like terms: 5 + -5 = 0 0 + x = 14.317821063 + -5 x = 14.317821063 + -5 Combine like terms: 14.317821063 + -5 = 9.317821063 x = 9.317821063 Simplifying x = 9.317821063

Subproblem 2

x + 5 = -14.317821063 Simplifying x + 5 = -14.317821063 Reorder the terms: 5 + x = -14.317821063 Solving 5 + x = -14.317821063 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -14.317821063 + -5 Combine like terms: 5 + -5 = 0 0 + x = -14.317821063 + -5 x = -14.317821063 + -5 Combine like terms: -14.317821063 + -5 = -19.317821063 x = -19.317821063 Simplifying x = -19.317821063

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.317821063, -19.317821063}

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