2w^2+11w+15=w^2+9

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Solution for 2w^2+11w+15=w^2+9 equation:


Simplifying
2w2 + 11w + 15 = w2 + 9

Reorder the terms:
15 + 11w + 2w2 = w2 + 9

Reorder the terms:
15 + 11w + 2w2 = 9 + w2

Solving
15 + 11w + 2w2 = 9 + w2

Solving for variable 'w'.

Reorder the terms:
15 + -9 + 11w + 2w2 + -1w2 = 9 + w2 + -9 + -1w2

Combine like terms: 15 + -9 = 6
6 + 11w + 2w2 + -1w2 = 9 + w2 + -9 + -1w2

Combine like terms: 2w2 + -1w2 = 1w2
6 + 11w + 1w2 = 9 + w2 + -9 + -1w2

Reorder the terms:
6 + 11w + 1w2 = 9 + -9 + w2 + -1w2

Combine like terms: 9 + -9 = 0
6 + 11w + 1w2 = 0 + w2 + -1w2
6 + 11w + 1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
6 + 11w + 1w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 11w + -6 + w2 = 0 + -6

Reorder the terms:
6 + -6 + 11w + w2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 11w + w2 = 0 + -6
11w + w2 = 0 + -6

Combine like terms: 0 + -6 = -6
11w + w2 = -6

The w term is 11w.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11w + 30.25 + w2 = -6 + 30.25

Reorder the terms:
30.25 + 11w + w2 = -6 + 30.25

Combine like terms: -6 + 30.25 = 24.25
30.25 + 11w + w2 = 24.25

Factor a perfect square on the left side:
(w + 5.5)(w + 5.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(w + 5.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

w + 5.5 = 4.924428901 Simplifying w + 5.5 = 4.924428901 Reorder the terms: 5.5 + w = 4.924428901 Solving 5.5 + w = 4.924428901 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + w = 4.924428901 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + w = 4.924428901 + -5.5 w = 4.924428901 + -5.5 Combine like terms: 4.924428901 + -5.5 = -0.575571099 w = -0.575571099 Simplifying w = -0.575571099

Subproblem 2

w + 5.5 = -4.924428901 Simplifying w + 5.5 = -4.924428901 Reorder the terms: 5.5 + w = -4.924428901 Solving 5.5 + w = -4.924428901 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + w = -4.924428901 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + w = -4.924428901 + -5.5 w = -4.924428901 + -5.5 Combine like terms: -4.924428901 + -5.5 = -10.424428901 w = -10.424428901 Simplifying w = -10.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. w = {-0.575571099, -10.424428901}

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