Answer Key to Prime Trinomials Practice Problems
1.
2.
is prime. The possible pairs of factors of –6 are 6 and –1 as well as 3
and –2. None of these factors add up to 7.
3.
is prime. The possible pairs of factors of 6(–5) = –30 are –30 and 1, –
15 and 2, –10 and 3, as well as –6 and 5. None of these factors add up to –4.
4.
5.
6.
is prime. The only pair of factors of 2(1) = 2 is 1 and 2. This factor does
not add up to 1.
7.
8.
is prime. The possible pairs of factors of 10 are –1 and –10 as well as
–2 and –5. None of these factors add up to –3.
9.
10.
is prime. The possible pairs of factors of 4(9) = 36 are –1 and –36, –2
and –18, –3 and –12, –4 and –9, as well as –6 and –6. None of these factors add up
to –6.
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