5w^3-4w^2-8w=0

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Solution for 5w^3-4w^2-8w=0 equation:


Simplifying
5w3 + -4w2 + -8w = 0

Reorder the terms:
-8w + -4w2 + 5w3 = 0

Solving
-8w + -4w2 + 5w3 = 0

Solving for variable 'w'.

Factor out the Greatest Common Factor (GCF), 'w'.
w(-8 + -4w + 5w2) = 0

Subproblem 1

Set the factor 'w' equal to zero and attempt to solve: Simplifying w = 0 Solving w = 0 Move all terms containing w to the left, all other terms to the right. Simplifying w = 0

Subproblem 2

Set the factor '(-8 + -4w + 5w2)' equal to zero and attempt to solve: Simplifying -8 + -4w + 5w2 = 0 Solving -8 + -4w + 5w2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -1.6 + -0.8w + w2 = 0 Move the constant term to the right: Add '1.6' to each side of the equation. -1.6 + -0.8w + 1.6 + w2 = 0 + 1.6 Reorder the terms: -1.6 + 1.6 + -0.8w + w2 = 0 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + -0.8w + w2 = 0 + 1.6 -0.8w + w2 = 0 + 1.6 Combine like terms: 0 + 1.6 = 1.6 -0.8w + w2 = 1.6 The w term is -0.8w. Take half its coefficient (-0.4). Square it (0.16) and add it to both sides. Add '0.16' to each side of the equation. -0.8w + 0.16 + w2 = 1.6 + 0.16 Reorder the terms: 0.16 + -0.8w + w2 = 1.6 + 0.16 Combine like terms: 1.6 + 0.16 = 1.76 0.16 + -0.8w + w2 = 1.76 Factor a perfect square on the left side: (w + -0.4)(w + -0.4) = 1.76 Calculate the square root of the right side: 1.326649916 Break this problem into two subproblems by setting (w + -0.4) equal to 1.326649916 and -1.326649916.

Subproblem 1

w + -0.4 = 1.326649916 Simplifying w + -0.4 = 1.326649916 Reorder the terms: -0.4 + w = 1.326649916 Solving -0.4 + w = 1.326649916 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + w = 1.326649916 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + w = 1.326649916 + 0.4 w = 1.326649916 + 0.4 Combine like terms: 1.326649916 + 0.4 = 1.726649916 w = 1.726649916 Simplifying w = 1.726649916

Subproblem 2

w + -0.4 = -1.326649916 Simplifying w + -0.4 = -1.326649916 Reorder the terms: -0.4 + w = -1.326649916 Solving -0.4 + w = -1.326649916 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + w = -1.326649916 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + w = -1.326649916 + 0.4 w = -1.326649916 + 0.4 Combine like terms: -1.326649916 + 0.4 = -0.926649916 w = -0.926649916 Simplifying w = -0.926649916

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.726649916, -0.926649916}

Solution

w = {0, 1.726649916, -0.926649916}

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