x^2 + 16x + 60 what two numbers add up to 16 and multiply to 60? 60=30*2=15*4=5*12 60=3*20=6*10 aha! difference of 16 so x2+6x+10x+60 factor like terms x(x+6)+10(x+6) put like terms together (x+10)(x+6) ;)