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1. (a) Quartic (b) 4 (c) - 1
2. (a) 1 (b) 5 + 4i (c) 21 + 7i
3.
4. (a) (b)
(c) (d)
(e) { - 4 , - 3 , 3 } (f) { 5 }
(g) { 7 } (h)
5. - 8
6. (a) (b)
7. (a) f(x) = - (x + 4)(x - 3)3 (b) f(x) = (x + 4)(x - 3)2