Question

What are the possible numbers of positive real, negative real, and complex zeros of
f(x) = -7x4 - 12x3 + 9x2 - 17x + 3?

Answer 1

all fractions where the numerator divides 3 and the denominator divides 7

Answer 2

not that many really
\[\pm1,\pm7,\pm\frac{3}{7},\pm\frac{1}{7}\]