(a) Use a graph to find a rational root of the polynomial function and factor f into a linear factor and a quadratic factor. (b) Find two complex roots of f. f(x) = x3 - 3x2 + 7x - 5
A. (a) x = -1, f(x) = (x + 1)(x2 + 2x - 5)
(b) x = 1 ± 2i
B. (a) x = 1, f(x) = (x - 1)(x2 + 2x + 5)
(b) x = -1 ± 2i
C. (a) x = 1, f(x) = (x - 1)(x2 - 2x + 5)
(b) x = 1 ± 5i
D. (a) x = 1, f(x) = (x - 1)(x2 - 2x + 5)
(b) x = 1 ± 2i
Answer: D
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