-2w(w-7)+8w+3=

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Solution for -2w(w-7)+8w+3= equation:


Simplifying
-2w(w + -7) + 8w + 3 = 0

Reorder the terms:
-2w(-7 + w) + 8w + 3 = 0
(-7 * -2w + w * -2w) + 8w + 3 = 0
(14w + -2w2) + 8w + 3 = 0

Reorder the terms:
3 + 14w + 8w + -2w2 = 0

Combine like terms: 14w + 8w = 22w
3 + 22w + -2w2 = 0

Solving
3 + 22w + -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'.
-1.5 + -11w + w2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -11w + 1.5 + w2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -11w + w2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -11w + w2 = 0 + 1.5
-11w + w2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-11w + w2 = 1.5

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 = 1.5 + 30.25

Reorder the terms:
30.25 + -11w + w2 = 1.5 + 30.25

Combine like terms: 1.5 + 30.25 = 31.75
30.25 + -11w + w2 = 31.75

Factor a perfect square on the left side:
(w + -5.5)(w + -5.5) = 31.75

Calculate the square root of the right side: 5.634713835

Break this problem into two subproblems by setting 
(w + -5.5) equal to 5.634713835 and -5.634713835.

Subproblem 1

w + -5.5 = 5.634713835 Simplifying w + -5.5 = 5.634713835 Reorder the terms: -5.5 + w = 5.634713835 Solving -5.5 + w = 5.634713835 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 = 5.634713835 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + w = 5.634713835 + 5.5 w = 5.634713835 + 5.5 Combine like terms: 5.634713835 + 5.5 = 11.134713835 w = 11.134713835 Simplifying w = 11.134713835

Subproblem 2

w + -5.5 = -5.634713835 Simplifying w + -5.5 = -5.634713835 Reorder the terms: -5.5 + w = -5.634713835 Solving -5.5 + w = -5.634713835 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 = -5.634713835 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + w = -5.634713835 + 5.5 w = -5.634713835 + 5.5 Combine like terms: -5.634713835 + 5.5 = -0.134713835 w = -0.134713835 Simplifying w = -0.134713835

Solution

The solution to the problem is based on the solutions from the subproblems. w = {11.134713835, -0.134713835}

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