Solve x2 â€“ 3x â€“ 4 = 0.
Choose the most appropriate option:
A) 1,4  B) -1,4  C) 2,3  D) 2,-3  E) 3,4
This one factors easily:   x2 â€“ 3x â€“ 4 = 0   (x + 1)(x â€“ 4) = 0   x + 1 = 0 or x â€“ 4 = 0   x = â€“1 or x = 4   The solution is x = â€“1, 4   ANSWER -1,4
<result>B</result>
Solve x2 â€“ 3x â€“ 4 = 0.