himpunan penyelesaian persamaan log(x-3)+log(x+4)=log(12-x)

log (x-3)+log(x+4)=log (12-x)
log [(x-4)(x+4] =log (12-x)
log (x^2-x+12)=log (12-x)
x^2-x+12=12-x
x^2-2x=0
x(x-2)=0
x=2