Question 189831
30x^2+4x–2
2(15x^2+2x-1)
2(15x^2+5x-3x-1)  What factors of 15*-1=-15 have a sum of +2? Ans +5 & -3
2[5x(3x+1)-(3x+1)]
2(5x-1)(3x+1)
.
Ed