[tex]F(x)=(3m+9)x+12,\ \ \ P=(2;6) \\x=2,\ \ \ y=6 \\\\ (3m+9)*2+12=6\\\\6m+18+12=6\\\\6m+30=6\\\\6m=6-30\\\\6m=-24\ \ |:6\\\\m=-4[/tex]