Question

Factor completely: 3x2 + 2x - 1
Answer
(3x + 1)(x + 1)
(3x + 1)(x - 1)
(3x - 1)(x + 1)
(3x - 1)(x - 1)

Answer 1

(x+1) (3 x-1)

Answer 2

you should explain the answers

Answer 3

if you feel the need to explain, then by all means explain

Answer 4

you simply foil it

Answer 5

try expanding each of the options

eg (3x + 1)(x - 1)
= 3x(x - 1) + 1(x - 1)
= 3x^2 - 3x + x - 1
= x^2 - 2x - 1

- its not this one