420n^4-708n^3+168n^2=0

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Solution for 420n^4-708n^3+168n^2=0 equation:


Simplifying
420n4 + -708n3 + 168n2 = 0

Reorder the terms:
168n2 + -708n3 + 420n4 = 0

Solving
168n2 + -708n3 + 420n4 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '12n2'.
12n2(14 + -59n + 35n2) = 0

Factor a trinomial.
12n2((2 + -7n)(7 + -5n)) = 0

Ignore the factor 12.

Subproblem 1

Set the factor 'n2' equal to zero and attempt to solve: Simplifying n2 = 0 Solving n2 = 0 Move all terms containing n to the left, all other terms to the right. Simplifying n2 = 0 Take the square root of each side: n = {0}

Subproblem 2

Set the factor '(2 + -7n)' equal to zero and attempt to solve: Simplifying 2 + -7n = 0 Solving 2 + -7n = 0 Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -7n = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7n = 0 + -2 -7n = 0 + -2 Combine like terms: 0 + -2 = -2 -7n = -2 Divide each side by '-7'. n = 0.2857142857 Simplifying n = 0.2857142857

Subproblem 3

Set the factor '(7 + -5n)' equal to zero and attempt to solve: Simplifying 7 + -5n = 0 Solving 7 + -5n = 0 Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -5n = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5n = 0 + -7 -5n = 0 + -7 Combine like terms: 0 + -7 = -7 -5n = -7 Divide each side by '-5'. n = 1.4 Simplifying n = 1.4

Solution

n = {0, 0.2857142857, 1.4}

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