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Simplifying 21n2 + -10n + -11 = 5 Reorder the terms: -11 + -10n + 21n2 = 5 Solving -11 + -10n + 21n2 = 5 Solving for variable 'n'. Reorder the terms: -11 + -5 + -10n + 21n2 = 5 + -5 Combine like terms: -11 + -5 = -16 -16 + -10n + 21n2 = 5 + -5 Combine like terms: 5 + -5 = 0 -16 + -10n + 21n2 = 0 Factor a trinomial. (-2 + -3n)(8 + -7n) = 0Subproblem 1
Set the factor '(-2 + -3n)' equal to zero and attempt to solve: Simplifying -2 + -3n = 0 Solving -2 + -3n = 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 + -3n = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3n = 0 + 2 -3n = 0 + 2 Combine like terms: 0 + 2 = 2 -3n = 2 Divide each side by '-3'. n = -0.6666666667 Simplifying n = -0.6666666667Subproblem 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 = 1.142857143Solution
n = {-0.6666666667, 1.142857143}
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