3w^2+18w-1=0

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Solution for 3w^2+18w-1=0 equation:


Simplifying
3w2 + 18w + -1 = 0

Reorder the terms:
-1 + 18w + 3w2 = 0

Solving
-1 + 18w + 3w2 = 0

Solving for variable 'w'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
-0.3333333333 + 6w + w2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 6w + 0.3333333333 + w2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 6w + w2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 6w + w2 = 0 + 0.3333333333
6w + w2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
6w + w2 = 0.3333333333

The w term is 6w.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6w + 9 + w2 = 0.3333333333 + 9

Reorder the terms:
9 + 6w + w2 = 0.3333333333 + 9

Combine like terms: 0.3333333333 + 9 = 9.3333333333
9 + 6w + w2 = 9.3333333333

Factor a perfect square on the left side:
(w + 3)(w + 3) = 9.3333333333

Calculate the square root of the right side: 3.055050463

Break this problem into two subproblems by setting 
(w + 3) equal to 3.055050463 and -3.055050463.

Subproblem 1

w + 3 = 3.055050463 Simplifying w + 3 = 3.055050463 Reorder the terms: 3 + w = 3.055050463 Solving 3 + w = 3.055050463 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + w = 3.055050463 + -3 Combine like terms: 3 + -3 = 0 0 + w = 3.055050463 + -3 w = 3.055050463 + -3 Combine like terms: 3.055050463 + -3 = 0.055050463 w = 0.055050463 Simplifying w = 0.055050463

Subproblem 2

w + 3 = -3.055050463 Simplifying w + 3 = -3.055050463 Reorder the terms: 3 + w = -3.055050463 Solving 3 + w = -3.055050463 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + w = -3.055050463 + -3 Combine like terms: 3 + -3 = 0 0 + w = -3.055050463 + -3 w = -3.055050463 + -3 Combine like terms: -3.055050463 + -3 = -6.055050463 w = -6.055050463 Simplifying w = -6.055050463

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.055050463, -6.055050463}

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