Find all rational zeros of f. Then (if necessary) use the depressed equation to find all roots of the equation f(x) = 0.f(x) = x4 - 3x3 - 7x2 + 9x + 12

A. {-1, 4, -}
B. {-4, -1, -}
C. {-4, 1, -}
D. {1, 4, -}


Answer: A

Mathematics

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