[tex]g(x)=2x^2+18x-4 \\\\[-0.35em] ~\dotfill\\\\ g(9)=2(9)^2+18(9)-4\implies g(9)=162+162-4\implies g(9)=320 \\\\[-0.35em] ~\dotfill\\\\ g(3x)=2(3x)^2+18(3x)-4\implies g(3x)=2(3^2x^2)+54x-4 \\\\\\ g(3x)=18x^2+54x-4 \\\\[-0.35em] ~\dotfill\\\\ g(1+5m)=2(1+5m)^2+18(1+5m)-4 \\\\\\ g(1+5m)=2(1+5m)(1+5m)+18+90m-4 \\\\\\ g(1+5m)=2(\stackrel{F~O~I~L}{1+10m+25m^2})+90m+14 \\\\\\ g(1+5m)=2+20m+50m^2+90m+14 \\\\\\ g(1+5m)=50m^2+110m+16[/tex]
