x(1+x)+(2+x)=228

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Solution for x(1+x)+(2+x)=228 equation:


Simplifying
x(1 + x) + (2 + x) = 228
(1 * x + x * x) + (2 + x) = 228
(1x + x2) + (2 + x) = 228

Remove parenthesis around (2 + x)
1x + x2 + 2 + x = 228

Reorder the terms:
2 + 1x + x + x2 = 228

Combine like terms: 1x + x = 2x
2 + 2x + x2 = 228

Solving
2 + 2x + x2 = 228

Solving for variable 'x'.

Reorder the terms:
2 + -228 + 2x + x2 = 228 + -228

Combine like terms: 2 + -228 = -226
-226 + 2x + x2 = 228 + -228

Combine like terms: 228 + -228 = 0
-226 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '226' to each side of the equation.
-226 + 2x + 226 + x2 = 0 + 226

Reorder the terms:
-226 + 226 + 2x + x2 = 0 + 226

Combine like terms: -226 + 226 = 0
0 + 2x + x2 = 0 + 226
2x + x2 = 0 + 226

Combine like terms: 0 + 226 = 226
2x + x2 = 226

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 = 226 + 1

Reorder the terms:
1 + 2x + x2 = 226 + 1

Combine like terms: 226 + 1 = 227
1 + 2x + x2 = 227

Factor a perfect square on the left side:
(x + 1)(x + 1) = 227

Calculate the square root of the right side: 15.066519173

Break this problem into two subproblems by setting 
(x + 1) equal to 15.066519173 and -15.066519173.

Subproblem 1

x + 1 = 15.066519173 Simplifying x + 1 = 15.066519173 Reorder the terms: 1 + x = 15.066519173 Solving 1 + x = 15.066519173 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 = 15.066519173 + -1 Combine like terms: 1 + -1 = 0 0 + x = 15.066519173 + -1 x = 15.066519173 + -1 Combine like terms: 15.066519173 + -1 = 14.066519173 x = 14.066519173 Simplifying x = 14.066519173

Subproblem 2

x + 1 = -15.066519173 Simplifying x + 1 = -15.066519173 Reorder the terms: 1 + x = -15.066519173 Solving 1 + x = -15.066519173 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 = -15.066519173 + -1 Combine like terms: 1 + -1 = 0 0 + x = -15.066519173 + -1 x = -15.066519173 + -1 Combine like terms: -15.066519173 + -1 = -16.066519173 x = -16.066519173 Simplifying x = -16.066519173

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.066519173, -16.066519173}

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