Question

Factor the four-term polynomial.

st + 6s - 2t - 12?

(s - 4)(t + 3),
(s + 6)(t - 2),
(t + 6)(s - 2

Answer 1

take the first two terms and factor out the s

s(t+ 6)

take the last two terms and factor out -2 and combine with the first answer

s(t+6) - 2(t+6)

notice that we have two t+6 expressions, factor this to get

(t + 6)(s - 2)

Answer 2

factor by grouping.