(-3w^2-3w+2)-(-3w^2+6w+7)+(-5w^2+8w+6)=0

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Solution for (-3w^2-3w+2)-(-3w^2+6w+7)+(-5w^2+8w+6)=0 equation:


Simplifying
(-3w2 + -3w + 2) + -1(-3w2 + 6w + 7) + (-5w2 + 8w + 6) = 0

Reorder the terms:
(2 + -3w + -3w2) + -1(-3w2 + 6w + 7) + (-5w2 + 8w + 6) = 0

Remove parenthesis around (2 + -3w + -3w2)
2 + -3w + -3w2 + -1(-3w2 + 6w + 7) + (-5w2 + 8w + 6) = 0

Reorder the terms:
2 + -3w + -3w2 + -1(7 + 6w + -3w2) + (-5w2 + 8w + 6) = 0
2 + -3w + -3w2 + (7 * -1 + 6w * -1 + -3w2 * -1) + (-5w2 + 8w + 6) = 0
2 + -3w + -3w2 + (-7 + -6w + 3w2) + (-5w2 + 8w + 6) = 0

Reorder the terms:
2 + -3w + -3w2 + -7 + -6w + 3w2 + (6 + 8w + -5w2) = 0

Remove parenthesis around (6 + 8w + -5w2)
2 + -3w + -3w2 + -7 + -6w + 3w2 + 6 + 8w + -5w2 = 0

Reorder the terms:
2 + -7 + 6 + -3w + -6w + 8w + -3w2 + 3w2 + -5w2 = 0

Combine like terms: 2 + -7 = -5
-5 + 6 + -3w + -6w + 8w + -3w2 + 3w2 + -5w2 = 0

Combine like terms: -5 + 6 = 1
1 + -3w + -6w + 8w + -3w2 + 3w2 + -5w2 = 0

Combine like terms: -3w + -6w = -9w
1 + -9w + 8w + -3w2 + 3w2 + -5w2 = 0

Combine like terms: -9w + 8w = -1w
1 + -1w + -3w2 + 3w2 + -5w2 = 0

Combine like terms: -3w2 + 3w2 = 0
1 + -1w + 0 + -5w2 = 0
1 + -1w + -5w2 = 0

Solving
1 + -1w + -5w2 = 0

Solving for variable 'w'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-0.2 + 0.2w + w2 = 0

Move the constant term to the right:

Add '0.2' to each side of the equation.
-0.2 + 0.2w + 0.2 + w2 = 0 + 0.2

Reorder the terms:
-0.2 + 0.2 + 0.2w + w2 = 0 + 0.2

Combine like terms: -0.2 + 0.2 = 0.0
0.0 + 0.2w + w2 = 0 + 0.2
0.2w + w2 = 0 + 0.2

Combine like terms: 0 + 0.2 = 0.2
0.2w + w2 = 0.2

The w term is 0.2w.  Take half its coefficient (0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
0.2w + 0.01 + w2 = 0.2 + 0.01

Reorder the terms:
0.01 + 0.2w + w2 = 0.2 + 0.01

Combine like terms: 0.2 + 0.01 = 0.21
0.01 + 0.2w + w2 = 0.21

Factor a perfect square on the left side:
(w + 0.1)(w + 0.1) = 0.21

Calculate the square root of the right side: 0.458257569

Break this problem into two subproblems by setting 
(w + 0.1) equal to 0.458257569 and -0.458257569.

Subproblem 1

w + 0.1 = 0.458257569 Simplifying w + 0.1 = 0.458257569 Reorder the terms: 0.1 + w = 0.458257569 Solving 0.1 + w = 0.458257569 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + w = 0.458257569 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + w = 0.458257569 + -0.1 w = 0.458257569 + -0.1 Combine like terms: 0.458257569 + -0.1 = 0.358257569 w = 0.358257569 Simplifying w = 0.358257569

Subproblem 2

w + 0.1 = -0.458257569 Simplifying w + 0.1 = -0.458257569 Reorder the terms: 0.1 + w = -0.458257569 Solving 0.1 + w = -0.458257569 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + w = -0.458257569 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + w = -0.458257569 + -0.1 w = -0.458257569 + -0.1 Combine like terms: -0.458257569 + -0.1 = -0.558257569 w = -0.558257569 Simplifying w = -0.558257569

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.358257569, -0.558257569}

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