SOLUTION: Factor the following: r(s) = 2s^2 + st - 2s -t a. r(s) = 2(s+1)(s-1) b. r(s) = (2s-t)(s-1) c. r(s) = (2s+1)(s-1) d. This cannot be factored; it's prime I selected d

Question 141203: Factor the following:
r(s) = 2s^2 + st - 2s -t
a. r(s) = 2(s+1)(s-1)
b. r(s) = (2s-t)(s-1)
c. r(s) = (2s+1)(s-1)
d. This cannot be factored; it's prime
I selected d.
Found 2 solutions by nabla, vleith:
Answer by nabla(475) (Show Source): You can put this solution on YOUR website!
r(s) = 2s^2 + st - 2s -t
r(s) = s(2s + t) - 1 (2s + t) (Factoring and grouping)
r(s) = (s - 1)(2s + t) (Factor out (2s+t leaving the answer)
Your answer is c.
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Given:

So I am going with e. Which is c with a typo :-D
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