x^2+4x-224=0

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Solution for x^2+4x-224=0 equation:


Simplifying
x2 + 4x + -224 = 0

Reorder the terms:
-224 + 4x + x2 = 0

Solving
-224 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '224' to each side of the equation.
-224 + 4x + 224 + x2 = 0 + 224

Reorder the terms:
-224 + 224 + 4x + x2 = 0 + 224

Combine like terms: -224 + 224 = 0
0 + 4x + x2 = 0 + 224
4x + x2 = 0 + 224

Combine like terms: 0 + 224 = 224
4x + x2 = 224

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 = 224 + 4

Reorder the terms:
4 + 4x + x2 = 224 + 4

Combine like terms: 224 + 4 = 228
4 + 4x + x2 = 228

Factor a perfect square on the left side:
(x + 2)(x + 2) = 228

Calculate the square root of the right side: 15.099668871

Break this problem into two subproblems by setting 
(x + 2) equal to 15.099668871 and -15.099668871.

Subproblem 1

x + 2 = 15.099668871 Simplifying x + 2 = 15.099668871 Reorder the terms: 2 + x = 15.099668871 Solving 2 + x = 15.099668871 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 = 15.099668871 + -2 Combine like terms: 2 + -2 = 0 0 + x = 15.099668871 + -2 x = 15.099668871 + -2 Combine like terms: 15.099668871 + -2 = 13.099668871 x = 13.099668871 Simplifying x = 13.099668871

Subproblem 2

x + 2 = -15.099668871 Simplifying x + 2 = -15.099668871 Reorder the terms: 2 + x = -15.099668871 Solving 2 + x = -15.099668871 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 = -15.099668871 + -2 Combine like terms: 2 + -2 = 0 0 + x = -15.099668871 + -2 x = -15.099668871 + -2 Combine like terms: -15.099668871 + -2 = -17.099668871 x = -17.099668871 Simplifying x = -17.099668871

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.099668871, -17.099668871}

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