3(w-9)+(w+9)w=-8

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Solution for 3(w-9)+(w+9)w=-8 equation:


Simplifying
3(w + -9) + (w + 9) * w = -8

Reorder the terms:
3(-9 + w) + (w + 9) * w = -8
(-9 * 3 + w * 3) + (w + 9) * w = -8
(-27 + 3w) + (w + 9) * w = -8

Reorder the terms:
-27 + 3w + (9 + w) * w = -8

Reorder the terms for easier multiplication:
-27 + 3w + w(9 + w) = -8
-27 + 3w + (9 * w + w * w) = -8
-27 + 3w + (9w + w2) = -8

Combine like terms: 3w + 9w = 12w
-27 + 12w + w2 = -8

Solving
-27 + 12w + w2 = -8

Solving for variable 'w'.

Reorder the terms:
-27 + 8 + 12w + w2 = -8 + 8

Combine like terms: -27 + 8 = -19
-19 + 12w + w2 = -8 + 8

Combine like terms: -8 + 8 = 0
-19 + 12w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + 12w + 19 + w2 = 0 + 19

Reorder the terms:
-19 + 19 + 12w + w2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 12w + w2 = 0 + 19
12w + w2 = 0 + 19

Combine like terms: 0 + 19 = 19
12w + w2 = 19

The w term is 12w.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12w + 36 + w2 = 19 + 36

Reorder the terms:
36 + 12w + w2 = 19 + 36

Combine like terms: 19 + 36 = 55
36 + 12w + w2 = 55

Factor a perfect square on the left side:
(w + 6)(w + 6) = 55

Calculate the square root of the right side: 7.416198487

Break this problem into two subproblems by setting 
(w + 6) equal to 7.416198487 and -7.416198487.

Subproblem 1

w + 6 = 7.416198487 Simplifying w + 6 = 7.416198487 Reorder the terms: 6 + w = 7.416198487 Solving 6 + w = 7.416198487 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + w = 7.416198487 + -6 Combine like terms: 6 + -6 = 0 0 + w = 7.416198487 + -6 w = 7.416198487 + -6 Combine like terms: 7.416198487 + -6 = 1.416198487 w = 1.416198487 Simplifying w = 1.416198487

Subproblem 2

w + 6 = -7.416198487 Simplifying w + 6 = -7.416198487 Reorder the terms: 6 + w = -7.416198487 Solving 6 + w = -7.416198487 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + w = -7.416198487 + -6 Combine like terms: 6 + -6 = 0 0 + w = -7.416198487 + -6 w = -7.416198487 + -6 Combine like terms: -7.416198487 + -6 = -13.416198487 w = -13.416198487 Simplifying w = -13.416198487

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.416198487, -13.416198487}

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