21n^2-31n+8=0

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Solution for 21n^2-31n+8=0 equation:


Simplifying
21n2 + -31n + 8 = 0

Reorder the terms:
8 + -31n + 21n2 = 0

Solving
8 + -31n + 21n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(1 + -3n)(8 + -7n) = 0

Subproblem 1

Set the factor '(1 + -3n)' equal to zero and attempt to solve: Simplifying 1 + -3n = 0 Solving 1 + -3n = 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 + -3n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3n = 0 + -1 -3n = 0 + -1 Combine like terms: 0 + -1 = -1 -3n = -1 Divide each side by '-3'. n = 0.3333333333 Simplifying n = 0.3333333333

Subproblem 2

Set the factor '(8 + -7n)' equal to zero and attempt to solve: Simplifying 8 + -7n = 0 Solving 8 + -7n = 0 Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -7n = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7n = 0 + -8 -7n = 0 + -8 Combine like terms: 0 + -8 = -8 -7n = -8 Divide each side by '-7'. n = 1.142857143 Simplifying n = 1.142857143

Solution

n = {0.3333333333, 1.142857143}

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