210=w^2+3w

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Solution for 210=w^2+3w equation:


Simplifying
210 = w2 + 3w

Reorder the terms:
210 = 3w + w2

Solving
210 = 3w + w2

Solving for variable 'w'.

Reorder the terms:
210 + -3w + -1w2 = 3w + -3w + w2 + -1w2

Combine like terms: 3w + -3w = 0
210 + -3w + -1w2 = 0 + w2 + -1w2
210 + -3w + -1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
210 + -3w + -1w2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-210 + 3w + w2 = 0

Move the constant term to the right:

Add '210' to each side of the equation.
-210 + 3w + 210 + w2 = 0 + 210

Reorder the terms:
-210 + 210 + 3w + w2 = 0 + 210

Combine like terms: -210 + 210 = 0
0 + 3w + w2 = 0 + 210
3w + w2 = 0 + 210

Combine like terms: 0 + 210 = 210
3w + w2 = 210

The w term is 3w.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3w + 2.25 + w2 = 210 + 2.25

Reorder the terms:
2.25 + 3w + w2 = 210 + 2.25

Combine like terms: 210 + 2.25 = 212.25
2.25 + 3w + w2 = 212.25

Factor a perfect square on the left side:
(w + 1.5)(w + 1.5) = 212.25

Calculate the square root of the right side: 14.568802284

Break this problem into two subproblems by setting 
(w + 1.5) equal to 14.568802284 and -14.568802284.

Subproblem 1

w + 1.5 = 14.568802284 Simplifying w + 1.5 = 14.568802284 Reorder the terms: 1.5 + w = 14.568802284 Solving 1.5 + w = 14.568802284 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + w = 14.568802284 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + w = 14.568802284 + -1.5 w = 14.568802284 + -1.5 Combine like terms: 14.568802284 + -1.5 = 13.068802284 w = 13.068802284 Simplifying w = 13.068802284

Subproblem 2

w + 1.5 = -14.568802284 Simplifying w + 1.5 = -14.568802284 Reorder the terms: 1.5 + w = -14.568802284 Solving 1.5 + w = -14.568802284 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + w = -14.568802284 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + w = -14.568802284 + -1.5 w = -14.568802284 + -1.5 Combine like terms: -14.568802284 + -1.5 = -16.068802284 w = -16.068802284 Simplifying w = -16.068802284

Solution

The solution to the problem is based on the solutions from the subproblems. w = {13.068802284, -16.068802284}

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