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MyCDLI
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11. f(x) = (x + 4)(x + 1)(x - 3)2 12. f(x) = - (x + 4)(x + 1)
13. f(x) = - (x + 4) 14. f(x) = 2(x + 3)(x - 2)2
15. f(x) = - x(x - 3)(x + 2)(x +4) 16. f(x) = (x - 3)3