-4(3w-5)-(2w^2-8w+9)=0

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Solution for -4(3w-5)-(2w^2-8w+9)=0 equation:


Simplifying
-4(3w + -5) + -1(2w2 + -8w + 9) = 0

Reorder the terms:
-4(-5 + 3w) + -1(2w2 + -8w + 9) = 0
(-5 * -4 + 3w * -4) + -1(2w2 + -8w + 9) = 0
(20 + -12w) + -1(2w2 + -8w + 9) = 0

Reorder the terms:
20 + -12w + -1(9 + -8w + 2w2) = 0
20 + -12w + (9 * -1 + -8w * -1 + 2w2 * -1) = 0
20 + -12w + (-9 + 8w + -2w2) = 0

Reorder the terms:
20 + -9 + -12w + 8w + -2w2 = 0

Combine like terms: 20 + -9 = 11
11 + -12w + 8w + -2w2 = 0

Combine like terms: -12w + 8w = -4w
11 + -4w + -2w2 = 0

Solving
11 + -4w + -2w2 = 0

Solving for variable 'w'.

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

Divide each side by '-2'.
-5.5 + 2w + w2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + 2w + 5.5 + w2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + 2w + w2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + 2w + w2 = 0 + 5.5
2w + w2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
2w + w2 = 5.5

The w term is 2w.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2w + 1 + w2 = 5.5 + 1

Reorder the terms:
1 + 2w + w2 = 5.5 + 1

Combine like terms: 5.5 + 1 = 6.5
1 + 2w + w2 = 6.5

Factor a perfect square on the left side:
(w + 1)(w + 1) = 6.5

Calculate the square root of the right side: 2.549509757

Break this problem into two subproblems by setting 
(w + 1) equal to 2.549509757 and -2.549509757.

Subproblem 1

w + 1 = 2.549509757 Simplifying w + 1 = 2.549509757 Reorder the terms: 1 + w = 2.549509757 Solving 1 + w = 2.549509757 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = 2.549509757 + -1 Combine like terms: 1 + -1 = 0 0 + w = 2.549509757 + -1 w = 2.549509757 + -1 Combine like terms: 2.549509757 + -1 = 1.549509757 w = 1.549509757 Simplifying w = 1.549509757

Subproblem 2

w + 1 = -2.549509757 Simplifying w + 1 = -2.549509757 Reorder the terms: 1 + w = -2.549509757 Solving 1 + w = -2.549509757 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = -2.549509757 + -1 Combine like terms: 1 + -1 = 0 0 + w = -2.549509757 + -1 w = -2.549509757 + -1 Combine like terms: -2.549509757 + -1 = -3.549509757 w = -3.549509757 Simplifying w = -3.549509757

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.549509757, -3.549509757}

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