2n^3+5n=7n

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Solution for 2n^3+5n=7n equation:


Simplifying
2n3 + 5n = 7n

Reorder the terms:
5n + 2n3 = 7n

Solving
5n + 2n3 = 7n

Solving for variable 'n'.

Reorder the terms:
5n + -7n + 2n3 = 7n + -7n

Combine like terms: 5n + -7n = -2n
-2n + 2n3 = 7n + -7n

Combine like terms: 7n + -7n = 0
-2n + 2n3 = 0

Factor out the Greatest Common Factor (GCF), '2n'.
2n(-1 + n2) = 0

Factor a difference between two squares.
2n((1 + n)(-1 + n)) = 0

Ignore the factor 2.

Subproblem 1

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

Subproblem 2

Set the factor '(1 + n)' equal to zero and attempt to solve: Simplifying 1 + n = 0 Solving 1 + n = 0 Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + n = 0 + -1 n = 0 + -1 Combine like terms: 0 + -1 = -1 n = -1 Simplifying n = -1

Subproblem 3

Set the factor '(-1 + n)' equal to zero and attempt to solve: Simplifying -1 + n = 0 Solving -1 + n = 0 Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = 0 + 1 Combine like terms: -1 + 1 = 0 0 + n = 0 + 1 n = 0 + 1 Combine like terms: 0 + 1 = 1 n = 1 Simplifying n = 1

Solution

n = {0, -1, 1}

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