x^2+4x-299=0

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Solution for x^2+4x-299=0 equation:


Simplifying
x2 + 4x + -299 = 0

Reorder the terms:
-299 + 4x + x2 = 0

Solving
-299 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '299' to each side of the equation.
-299 + 4x + 299 + x2 = 0 + 299

Reorder the terms:
-299 + 299 + 4x + x2 = 0 + 299

Combine like terms: -299 + 299 = 0
0 + 4x + x2 = 0 + 299
4x + x2 = 0 + 299

Combine like terms: 0 + 299 = 299
4x + x2 = 299

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 = 299 + 4

Reorder the terms:
4 + 4x + x2 = 299 + 4

Combine like terms: 299 + 4 = 303
4 + 4x + x2 = 303

Factor a perfect square on the left side:
(x + 2)(x + 2) = 303

Calculate the square root of the right side: 17.406895186

Break this problem into two subproblems by setting 
(x + 2) equal to 17.406895186 and -17.406895186.

Subproblem 1

x + 2 = 17.406895186 Simplifying x + 2 = 17.406895186 Reorder the terms: 2 + x = 17.406895186 Solving 2 + x = 17.406895186 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 = 17.406895186 + -2 Combine like terms: 2 + -2 = 0 0 + x = 17.406895186 + -2 x = 17.406895186 + -2 Combine like terms: 17.406895186 + -2 = 15.406895186 x = 15.406895186 Simplifying x = 15.406895186

Subproblem 2

x + 2 = -17.406895186 Simplifying x + 2 = -17.406895186 Reorder the terms: 2 + x = -17.406895186 Solving 2 + x = -17.406895186 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 = -17.406895186 + -2 Combine like terms: 2 + -2 = 0 0 + x = -17.406895186 + -2 x = -17.406895186 + -2 Combine like terms: -17.406895186 + -2 = -19.406895186 x = -19.406895186 Simplifying x = -19.406895186

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.406895186, -19.406895186}

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