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Simplifying f[n] = [n + -1][n + -2] Multiply f * n fn = [n + -1][n + -2] Reorder the terms: fn = [-1 + n][n + -2] Reorder the terms: fn = [-1 + n][-2 + n] Multiply [-1 + n] * [-2 + n] fn = [-1[-2 + n] + n[-2 + n]] fn = [[-2 * -1 + n * -1] + n[-2 + n]] fn = [[2 + -1n] + n[-2 + n]] fn = [2 + -1n + [-2 * n + n * n]] fn = [2 + -1n + [-2n + n2]] Combine like terms: -1n + -2n = -3n fn = [2 + -3n + n2] Solving fn = 2 + -3n + n2 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Divide each side by 'n'. f = 2n-1 + -3 + n Simplifying f = 2n-1 + -3 + n Reorder the terms: f = -3 + 2n-1 + n
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