This kind of thing just takes practice. You know the factors will look like one of
(12x-?)(x-?)
(6x-?)(2x-?)
(4x-?)(3x-?)
where the two ? numbers are 1 and 5. Then it's just trial and error. Eventually you will wind up with
12x^2-23x+5
(4x-1)(3x-5)
factorize completely :
12x squared-23x+5
2 answers
thanks much, God bless you