First get them all on one side add 7x+60 to both sides 0=x^2+17x+60 now factor what 2 numbers mutltiply to get 60 and add to get 17? 5 and 12 0=(x+5)(x+12) set each to zero
0=x+5 -5=x
0=x+12 -12=x
the factored form is (x+5)(x+12)=0 the solutions are x=-12 and -5