Answer
a. 0
b. factor
c. x
Work Step by Step
Please see "REAL ZEROS OF POLYNOMIALS", page 259:
a. c is a zero of P means P(c)=0
( a solution to P(x)=0)
b. (x-c) is a factor of P(x)
(c) c is an x-intercept of the graph of P.
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