4x^3-2x^2-5x=0

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


Simplifying
4x3 + -2x2 + -5x = 0

Reorder the terms:
-5x + -2x2 + 4x3 = 0

Solving
-5x + -2x2 + 4x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-5 + -2x + 4x2) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(-5 + -2x + 4x2)' equal to zero and attempt to solve: Simplifying -5 + -2x + 4x2 = 0 Solving -5 + -2x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.25 + -0.5x + x2 = 0 Move the constant term to the right: Add '1.25' to each side of the equation. -1.25 + -0.5x + 1.25 + x2 = 0 + 1.25 Reorder the terms: -1.25 + 1.25 + -0.5x + x2 = 0 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + -0.5x + x2 = 0 + 1.25 -0.5x + x2 = 0 + 1.25 Combine like terms: 0 + 1.25 = 1.25 -0.5x + x2 = 1.25 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = 1.25 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 1.25 + 0.0625 Combine like terms: 1.25 + 0.0625 = 1.3125 0.0625 + -0.5x + x2 = 1.3125 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 1.3125 Calculate the square root of the right side: 1.145643924 Break this problem into two subproblems by setting (x + -0.25) equal to 1.145643924 and -1.145643924.

Subproblem 1

x + -0.25 = 1.145643924 Simplifying x + -0.25 = 1.145643924 Reorder the terms: -0.25 + x = 1.145643924 Solving -0.25 + x = 1.145643924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 1.145643924 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 1.145643924 + 0.25 x = 1.145643924 + 0.25 Combine like terms: 1.145643924 + 0.25 = 1.395643924 x = 1.395643924 Simplifying x = 1.395643924

Subproblem 2

x + -0.25 = -1.145643924 Simplifying x + -0.25 = -1.145643924 Reorder the terms: -0.25 + x = -1.145643924 Solving -0.25 + x = -1.145643924 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -1.145643924 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -1.145643924 + 0.25 x = -1.145643924 + 0.25 Combine like terms: -1.145643924 + 0.25 = -0.895643924 x = -0.895643924 Simplifying x = -0.895643924

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.395643924, -0.895643924}

Solution

x = {0, 1.395643924, -0.895643924}

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