Can some one explain how to do the angles

Iknow the answer but the calculator doesn't seem to give the right one

Factor this polynomial completely. 12x^2+ x-6

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9