3w^2+70w+216=0

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Solution for 3w^2+70w+216=0 equation:


Simplifying
3w2 + 70w + 216 = 0

Reorder the terms:
216 + 70w + 3w2 = 0

Solving
216 + 70w + 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'.
72 + 23.33333333w + w2 = 0

Move the constant term to the right:

Add '-72' to each side of the equation.
72 + 23.33333333w + -72 + w2 = 0 + -72

Reorder the terms:
72 + -72 + 23.33333333w + w2 = 0 + -72

Combine like terms: 72 + -72 = 0
0 + 23.33333333w + w2 = 0 + -72
23.33333333w + w2 = 0 + -72

Combine like terms: 0 + -72 = -72
23.33333333w + w2 = -72

The w term is 23.33333333w.  Take half its coefficient (11.66666667).
Square it (136.1111112) and add it to both sides.

Add '136.1111112' to each side of the equation.
23.33333333w + 136.1111112 + w2 = -72 + 136.1111112

Reorder the terms:
136.1111112 + 23.33333333w + w2 = -72 + 136.1111112

Combine like terms: -72 + 136.1111112 = 64.1111112
136.1111112 + 23.33333333w + w2 = 64.1111112

Factor a perfect square on the left side:
(w + 11.66666667)(w + 11.66666667) = 64.1111112

Calculate the square root of the right side: 8.006941439

Break this problem into two subproblems by setting 
(w + 11.66666667) equal to 8.006941439 and -8.006941439.

Subproblem 1

w + 11.66666667 = 8.006941439 Simplifying w + 11.66666667 = 8.006941439 Reorder the terms: 11.66666667 + w = 8.006941439 Solving 11.66666667 + w = 8.006941439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-11.66666667' to each side of the equation. 11.66666667 + -11.66666667 + w = 8.006941439 + -11.66666667 Combine like terms: 11.66666667 + -11.66666667 = 0.00000000 0.00000000 + w = 8.006941439 + -11.66666667 w = 8.006941439 + -11.66666667 Combine like terms: 8.006941439 + -11.66666667 = -3.659725231 w = -3.659725231 Simplifying w = -3.659725231

Subproblem 2

w + 11.66666667 = -8.006941439 Simplifying w + 11.66666667 = -8.006941439 Reorder the terms: 11.66666667 + w = -8.006941439 Solving 11.66666667 + w = -8.006941439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-11.66666667' to each side of the equation. 11.66666667 + -11.66666667 + w = -8.006941439 + -11.66666667 Combine like terms: 11.66666667 + -11.66666667 = 0.00000000 0.00000000 + w = -8.006941439 + -11.66666667 w = -8.006941439 + -11.66666667 Combine like terms: -8.006941439 + -11.66666667 = -19.673608109 w = -19.673608109 Simplifying w = -19.673608109

Solution

The solution to the problem is based on the solutions from the subproblems. w = {-3.659725231, -19.673608109}

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