Asked by Math is TOUGH

which of the following is true about the polynomial f(x) = x3 + 9x2 + 24x + 16 ?
a. -1 is a zero
b. 1 is a zero
c. -2 is a zero
d. 2i is a zero
Answered by bobpursley
f(-2)=-8+36-48+16=not zero
f(-1)=-1+9-24+16= zero, it is a zero.
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