Omar grouped the terms and factored the gcf out of the groups of the polynomial 3x3 – 15x2 – 4x + 20. his work is shown. step 1: (3x3 – 15x2) + (–4x + 20) step 2: 3x2(x – 5) + 4(–x + 5) omar noticed that he does not have a common factor. which accurately describes what omar should do next? a omar should realize that his work shows that the polynomial is prime. b omar should go back and regroup the terms in step 1 as (3x3 – 15x2) – (4x + 20). c in step 2, omar should factor only out of the first expression. d omar should factor out a negative from one of the groups so the binomials will be the same.

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?