x^2+4x-228=0

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Solution for x^2+4x-228=0 equation:


Simplifying
x2 + 4x + -228 = 0

Reorder the terms:
-228 + 4x + x2 = 0

Solving
-228 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '228' to each side of the equation.
-228 + 4x + 228 + x2 = 0 + 228

Reorder the terms:
-228 + 228 + 4x + x2 = 0 + 228

Combine like terms: -228 + 228 = 0
0 + 4x + x2 = 0 + 228
4x + x2 = 0 + 228

Combine like terms: 0 + 228 = 228
4x + x2 = 228

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 228 + 4

Reorder the terms:
4 + 4x + x2 = 228 + 4

Combine like terms: 228 + 4 = 232
4 + 4x + x2 = 232

Factor a perfect square on the left side:
(x + 2)(x + 2) = 232

Calculate the square root of the right side: 15.231546212

Break this problem into two subproblems by setting 
(x + 2) equal to 15.231546212 and -15.231546212.

Subproblem 1

x + 2 = 15.231546212 Simplifying x + 2 = 15.231546212 Reorder the terms: 2 + x = 15.231546212 Solving 2 + x = 15.231546212 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 15.231546212 + -2 Combine like terms: 2 + -2 = 0 0 + x = 15.231546212 + -2 x = 15.231546212 + -2 Combine like terms: 15.231546212 + -2 = 13.231546212 x = 13.231546212 Simplifying x = 13.231546212

Subproblem 2

x + 2 = -15.231546212 Simplifying x + 2 = -15.231546212 Reorder the terms: 2 + x = -15.231546212 Solving 2 + x = -15.231546212 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -15.231546212 + -2 Combine like terms: 2 + -2 = 0 0 + x = -15.231546212 + -2 x = -15.231546212 + -2 Combine like terms: -15.231546212 + -2 = -17.231546212 x = -17.231546212 Simplifying x = -17.231546212

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.231546212, -17.231546212}

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