Respuesta :

undistribute 3
f(x)=3(x²-x-6)
what  2 numbes multiply to get -6 and add to get -1
-3 ad -2
f(x)=3(x-3)(x+2)
set to zero

x-3=0
x=3

x+2=0
x=-2


x=-2 and 2