(-2w^2-4w+9)+(-3w^2+5w-1)-(-6w^2+7w+7)=

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Solution for (-2w^2-4w+9)+(-3w^2+5w-1)-(-6w^2+7w+7)= equation:


Simplifying
(-2w2 + -4w + 9) + (-3w2 + 5w + -1) + -1(-6w2 + 7w + 7) = 0

Reorder the terms:
(9 + -4w + -2w2) + (-3w2 + 5w + -1) + -1(-6w2 + 7w + 7) = 0

Remove parenthesis around (9 + -4w + -2w2)
9 + -4w + -2w2 + (-3w2 + 5w + -1) + -1(-6w2 + 7w + 7) = 0

Reorder the terms:
9 + -4w + -2w2 + (-1 + 5w + -3w2) + -1(-6w2 + 7w + 7) = 0

Remove parenthesis around (-1 + 5w + -3w2)
9 + -4w + -2w2 + -1 + 5w + -3w2 + -1(-6w2 + 7w + 7) = 0

Reorder the terms:
9 + -4w + -2w2 + -1 + 5w + -3w2 + -1(7 + 7w + -6w2) = 0
9 + -4w + -2w2 + -1 + 5w + -3w2 + (7 * -1 + 7w * -1 + -6w2 * -1) = 0
9 + -4w + -2w2 + -1 + 5w + -3w2 + (-7 + -7w + 6w2) = 0

Reorder the terms:
9 + -1 + -7 + -4w + 5w + -7w + -2w2 + -3w2 + 6w2 = 0

Combine like terms: 9 + -1 = 8
8 + -7 + -4w + 5w + -7w + -2w2 + -3w2 + 6w2 = 0

Combine like terms: 8 + -7 = 1
1 + -4w + 5w + -7w + -2w2 + -3w2 + 6w2 = 0

Combine like terms: -4w + 5w = 1w
1 + 1w + -7w + -2w2 + -3w2 + 6w2 = 0

Combine like terms: 1w + -7w = -6w
1 + -6w + -2w2 + -3w2 + 6w2 = 0

Combine like terms: -2w2 + -3w2 = -5w2
1 + -6w + -5w2 + 6w2 = 0

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

Solving
1 + -6w + 1w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -6w + -1 + w2 = 0 + -1

Reorder the terms:
1 + -1 + -6w + w2 = 0 + -1

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

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

The w term is -6w.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6w + 9 + w2 = -1 + 9

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

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

Factor a perfect square on the left side:
(w + -3)(w + -3) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(w + -3) equal to 2.828427125 and -2.828427125.

Subproblem 1

w + -3 = 2.828427125 Simplifying w + -3 = 2.828427125 Reorder the terms: -3 + w = 2.828427125 Solving -3 + w = 2.828427125 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + w = 2.828427125 + 3 Combine like terms: -3 + 3 = 0 0 + w = 2.828427125 + 3 w = 2.828427125 + 3 Combine like terms: 2.828427125 + 3 = 5.828427125 w = 5.828427125 Simplifying w = 5.828427125

Subproblem 2

w + -3 = -2.828427125 Simplifying w + -3 = -2.828427125 Reorder the terms: -3 + w = -2.828427125 Solving -3 + w = -2.828427125 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + w = -2.828427125 + 3 Combine like terms: -3 + 3 = 0 0 + w = -2.828427125 + 3 w = -2.828427125 + 3 Combine like terms: -2.828427125 + 3 = 0.171572875 w = 0.171572875 Simplifying w = 0.171572875

Solution

The solution to the problem is based on the solutions from the subproblems. w = {5.828427125, 0.171572875}

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