6x^3-2x^2=40x

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Solution for 6x^3-2x^2=40x equation:


Simplifying
6x3 + -2x2 = 40x

Reorder the terms:
-2x2 + 6x3 = 40x

Solving
-2x2 + 6x3 = 40x

Solving for variable 'x'.

Reorder the terms:
-40x + -2x2 + 6x3 = 40x + -40x

Combine like terms: 40x + -40x = 0
-40x + -2x2 + 6x3 = 0

Factor out the Greatest Common Factor (GCF), '2x'.
2x(-20 + -1x + 3x2) = 0

Ignore the factor 2.

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 '(-20 + -1x + 3x2)' equal to zero and attempt to solve: Simplifying -20 + -1x + 3x2 = 0 Solving -20 + -1x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -6.666666667 + -0.3333333333x + x2 = 0 Move the constant term to the right: Add '6.666666667' to each side of the equation. -6.666666667 + -0.3333333333x + 6.666666667 + x2 = 0 + 6.666666667 Reorder the terms: -6.666666667 + 6.666666667 + -0.3333333333x + x2 = 0 + 6.666666667 Combine like terms: -6.666666667 + 6.666666667 = 0.000000000 0.000000000 + -0.3333333333x + x2 = 0 + 6.666666667 -0.3333333333x + x2 = 0 + 6.666666667 Combine like terms: 0 + 6.666666667 = 6.666666667 -0.3333333333x + x2 = 6.666666667 The x term is -0.3333333333x. Take half its coefficient (-0.1666666667). Square it (0.02777777779) and add it to both sides. Add '0.02777777779' to each side of the equation. -0.3333333333x + 0.02777777779 + x2 = 6.666666667 + 0.02777777779 Reorder the terms: 0.02777777779 + -0.3333333333x + x2 = 6.666666667 + 0.02777777779 Combine like terms: 6.666666667 + 0.02777777779 = 6.69444444479 0.02777777779 + -0.3333333333x + x2 = 6.69444444479 Factor a perfect square on the left side: (x + -0.1666666667)(x + -0.1666666667) = 6.69444444479 Calculate the square root of the right side: 2.587362449 Break this problem into two subproblems by setting (x + -0.1666666667) equal to 2.587362449 and -2.587362449.

Subproblem 1

x + -0.1666666667 = 2.587362449 Simplifying x + -0.1666666667 = 2.587362449 Reorder the terms: -0.1666666667 + x = 2.587362449 Solving -0.1666666667 + x = 2.587362449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = 2.587362449 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = 2.587362449 + 0.1666666667 x = 2.587362449 + 0.1666666667 Combine like terms: 2.587362449 + 0.1666666667 = 2.7540291157 x = 2.7540291157 Simplifying x = 2.7540291157

Subproblem 2

x + -0.1666666667 = -2.587362449 Simplifying x + -0.1666666667 = -2.587362449 Reorder the terms: -0.1666666667 + x = -2.587362449 Solving -0.1666666667 + x = -2.587362449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + x = -2.587362449 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + x = -2.587362449 + 0.1666666667 x = -2.587362449 + 0.1666666667 Combine like terms: -2.587362449 + 0.1666666667 = -2.4206957823 x = -2.4206957823 Simplifying x = -2.4206957823

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.7540291157, -2.4206957823}

Solution

x = {0, 2.7540291157, -2.4206957823}

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