Help I'm stuck

Question

I need to factor a trinomial expression using the AC method

15x^2 + 31x + 2

Answer 1

ac=30
factors must add to 31
30+1 = 31
(x+2)(15x+1)

or, regrouping a bit

15x^2 + 30x + x + 2
15x(x+2) + 15x+2
(15x+1)(x+2)

Answer 2

thank you

Answer 3

15x(x+2) + 1(x+2)