w^2+4w-1=0

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Solution for w^2+4w-1=0 equation:


Simplifying
w2 + 4w + -1 = 0

Reorder the terms:
-1 + 4w + w2 = 0

Solving
-1 + 4w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 4w + 1 + w2 = 0 + 1

Reorder the terms:
-1 + 1 + 4w + w2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 4w + w2 = 0 + 1
4w + w2 = 0 + 1

Combine like terms: 0 + 1 = 1
4w + w2 = 1

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

Add '4' to each side of the equation.
4w + 4 + w2 = 1 + 4

Reorder the terms:
4 + 4w + w2 = 1 + 4

Combine like terms: 1 + 4 = 5
4 + 4w + w2 = 5

Factor a perfect square on the left side:
(w + 2)(w + 2) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(w + 2) equal to 2.236067978 and -2.236067978.

Subproblem 1

w + 2 = 2.236067978 Simplifying w + 2 = 2.236067978 Reorder the terms: 2 + w = 2.236067978 Solving 2 + w = 2.236067978 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = 2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + w = 2.236067978 + -2 w = 2.236067978 + -2 Combine like terms: 2.236067978 + -2 = 0.236067978 w = 0.236067978 Simplifying w = 0.236067978

Subproblem 2

w + 2 = -2.236067978 Simplifying w + 2 = -2.236067978 Reorder the terms: 2 + w = -2.236067978 Solving 2 + w = -2.236067978 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = -2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + w = -2.236067978 + -2 w = -2.236067978 + -2 Combine like terms: -2.236067978 + -2 = -4.236067978 w = -4.236067978 Simplifying w = -4.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.236067978, -4.236067978}

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