0=-8w^2+6w+13

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Solution for 0=-8w^2+6w+13 equation:


Simplifying
0 = -8w2 + 6w + 13

Reorder the terms:
0 = 13 + 6w + -8w2

Solving
0 = 13 + 6w + -8w2

Solving for variable 'w'.

Combine like terms: 0 + -13 = -13
-13 + -6w + 8w2 = 13 + 6w + -8w2 + -13 + -6w + 8w2

Reorder the terms:
-13 + -6w + 8w2 = 13 + -13 + 6w + -6w + -8w2 + 8w2

Combine like terms: 13 + -13 = 0
-13 + -6w + 8w2 = 0 + 6w + -6w + -8w2 + 8w2
-13 + -6w + 8w2 = 6w + -6w + -8w2 + 8w2

Combine like terms: 6w + -6w = 0
-13 + -6w + 8w2 = 0 + -8w2 + 8w2
-13 + -6w + 8w2 = -8w2 + 8w2

Combine like terms: -8w2 + 8w2 = 0
-13 + -6w + 8w2 = 0

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

Divide each side by '8'.
-1.625 + -0.75w + w2 = 0

Move the constant term to the right:

Add '1.625' to each side of the equation.
-1.625 + -0.75w + 1.625 + w2 = 0 + 1.625

Reorder the terms:
-1.625 + 1.625 + -0.75w + w2 = 0 + 1.625

Combine like terms: -1.625 + 1.625 = 0.000
0.000 + -0.75w + w2 = 0 + 1.625
-0.75w + w2 = 0 + 1.625

Combine like terms: 0 + 1.625 = 1.625
-0.75w + w2 = 1.625

The w term is -0.75w.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75w + 0.140625 + w2 = 1.625 + 0.140625

Reorder the terms:
0.140625 + -0.75w + w2 = 1.625 + 0.140625

Combine like terms: 1.625 + 0.140625 = 1.765625
0.140625 + -0.75w + w2 = 1.765625

Factor a perfect square on the left side:
(w + -0.375)(w + -0.375) = 1.765625

Calculate the square root of the right side: 1.328768227

Break this problem into two subproblems by setting 
(w + -0.375) equal to 1.328768227 and -1.328768227.

Subproblem 1

w + -0.375 = 1.328768227 Simplifying w + -0.375 = 1.328768227 Reorder the terms: -0.375 + w = 1.328768227 Solving -0.375 + w = 1.328768227 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + w = 1.328768227 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + w = 1.328768227 + 0.375 w = 1.328768227 + 0.375 Combine like terms: 1.328768227 + 0.375 = 1.703768227 w = 1.703768227 Simplifying w = 1.703768227

Subproblem 2

w + -0.375 = -1.328768227 Simplifying w + -0.375 = -1.328768227 Reorder the terms: -0.375 + w = -1.328768227 Solving -0.375 + w = -1.328768227 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + w = -1.328768227 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + w = -1.328768227 + 0.375 w = -1.328768227 + 0.375 Combine like terms: -1.328768227 + 0.375 = -0.953768227 w = -0.953768227 Simplifying w = -0.953768227

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.703768227, -0.953768227}

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