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Simplifying 15n2 + 14n + -21 = 8n2 Reorder the terms: -21 + 14n + 15n2 = 8n2 Solving -21 + 14n + 15n2 = 8n2 Solving for variable 'n'. Combine like terms: 15n2 + -8n2 = 7n2 -21 + 14n + 7n2 = 8n2 + -8n2 Combine like terms: 8n2 + -8n2 = 0 -21 + 14n + 7n2 = 0 Factor out the Greatest Common Factor (GCF), '7'. 7(-3 + 2n + n2) = 0 Factor a trinomial. 7((-3 + -1n)(1 + -1n)) = 0 Ignore the factor 7.Subproblem 1
Set the factor '(-3 + -1n)' equal to zero and attempt to solve: Simplifying -3 + -1n = 0 Solving -3 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1n = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1n = 0 + 3 -1n = 0 + 3 Combine like terms: 0 + 3 = 3 -1n = 3 Divide each side by '-1'. n = -3 Simplifying n = -3Subproblem 2
Set the factor '(1 + -1n)' equal to zero and attempt to solve: Simplifying 1 + -1n = 0 Solving 1 + -1n = 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 + -1n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1n = 0 + -1 -1n = 0 + -1 Combine like terms: 0 + -1 = -1 -1n = -1 Divide each side by '-1'. n = 1 Simplifying n = 1Solution
n = {-3, 1}
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