-2w^2+8w=3

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Solution for -2w^2+8w=3 equation:


Simplifying
-2w2 + 8w = 3

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

Solving
8w + -2w2 = 3

Solving for variable 'w'.

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

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

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

Divide each side by '-2'.
1.5 + -4w + w2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + -4w + -1.5 + w2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + -4w + w2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + -4w + w2 = 0 + -1.5
-4w + w2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
-4w + w2 = -1.5

The w term is -4w.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4w + 4 + w2 = -1.5 + 4

Reorder the terms:
4 + -4w + w2 = -1.5 + 4

Combine like terms: -1.5 + 4 = 2.5
4 + -4w + w2 = 2.5

Factor a perfect square on the left side:
(w + -2)(w + -2) = 2.5

Calculate the square root of the right side: 1.58113883

Break this problem into two subproblems by setting 
(w + -2) equal to 1.58113883 and -1.58113883.

Subproblem 1

w + -2 = 1.58113883 Simplifying w + -2 = 1.58113883 Reorder the terms: -2 + w = 1.58113883 Solving -2 + w = 1.58113883 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + w = 1.58113883 + 2 Combine like terms: -2 + 2 = 0 0 + w = 1.58113883 + 2 w = 1.58113883 + 2 Combine like terms: 1.58113883 + 2 = 3.58113883 w = 3.58113883 Simplifying w = 3.58113883

Subproblem 2

w + -2 = -1.58113883 Simplifying w + -2 = -1.58113883 Reorder the terms: -2 + w = -1.58113883 Solving -2 + w = -1.58113883 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + w = -1.58113883 + 2 Combine like terms: -2 + 2 = 0 0 + w = -1.58113883 + 2 w = -1.58113883 + 2 Combine like terms: -1.58113883 + 2 = 0.41886117 w = 0.41886117 Simplifying w = 0.41886117

Solution

The solution to the problem is based on the solutions from the subproblems. w = {3.58113883, 0.41886117}

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