(w+3)=2w^2+4w-15

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Solution for (w+3)=2w^2+4w-15 equation:


Simplifying
(w + 3) = 2w2 + 4w + -15

Reorder the terms:
(3 + w) = 2w2 + 4w + -15

Remove parenthesis around (3 + w)
3 + w = 2w2 + 4w + -15

Reorder the terms:
3 + w = -15 + 4w + 2w2

Solving
3 + w = -15 + 4w + 2w2

Solving for variable 'w'.

Reorder the terms:
3 + 15 + w + -4w + -2w2 = -15 + 4w + 2w2 + 15 + -4w + -2w2

Combine like terms: 3 + 15 = 18
18 + w + -4w + -2w2 = -15 + 4w + 2w2 + 15 + -4w + -2w2

Combine like terms: w + -4w = -3w
18 + -3w + -2w2 = -15 + 4w + 2w2 + 15 + -4w + -2w2

Reorder the terms:
18 + -3w + -2w2 = -15 + 15 + 4w + -4w + 2w2 + -2w2

Combine like terms: -15 + 15 = 0
18 + -3w + -2w2 = 0 + 4w + -4w + 2w2 + -2w2
18 + -3w + -2w2 = 4w + -4w + 2w2 + -2w2

Combine like terms: 4w + -4w = 0
18 + -3w + -2w2 = 0 + 2w2 + -2w2
18 + -3w + -2w2 = 2w2 + -2w2

Combine like terms: 2w2 + -2w2 = 0
18 + -3w + -2w2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-9 + 1.5w + w2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 1.5w + 9 + w2 = 0 + 9

Reorder the terms:
-9 + 9 + 1.5w + w2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 1.5w + w2 = 0 + 9
1.5w + w2 = 0 + 9

Combine like terms: 0 + 9 = 9
1.5w + w2 = 9

The w term is 1.5w.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5w + 0.5625 + w2 = 9 + 0.5625

Reorder the terms:
0.5625 + 1.5w + w2 = 9 + 0.5625

Combine like terms: 9 + 0.5625 = 9.5625
0.5625 + 1.5w + w2 = 9.5625

Factor a perfect square on the left side:
(w + 0.75)(w + 0.75) = 9.5625

Calculate the square root of the right side: 3.092329219

Break this problem into two subproblems by setting 
(w + 0.75) equal to 3.092329219 and -3.092329219.

Subproblem 1

w + 0.75 = 3.092329219 Simplifying w + 0.75 = 3.092329219 Reorder the terms: 0.75 + w = 3.092329219 Solving 0.75 + w = 3.092329219 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + w = 3.092329219 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = 3.092329219 + -0.75 w = 3.092329219 + -0.75 Combine like terms: 3.092329219 + -0.75 = 2.342329219 w = 2.342329219 Simplifying w = 2.342329219

Subproblem 2

w + 0.75 = -3.092329219 Simplifying w + 0.75 = -3.092329219 Reorder the terms: 0.75 + w = -3.092329219 Solving 0.75 + w = -3.092329219 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + w = -3.092329219 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = -3.092329219 + -0.75 w = -3.092329219 + -0.75 Combine like terms: -3.092329219 + -0.75 = -3.842329219 w = -3.842329219 Simplifying w = -3.842329219

Solution

The solution to the problem is based on the solutions from the subproblems. w = {2.342329219, -3.842329219}

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