Answer:
[tex]9s^{2}[/tex]+6st+[tex]t^{2}[/tex]
Step-by-step explanation:
If it's binomial it would mean 2 so
(3s+t) (3s+t)
Times 3s and 3s = [tex]9s^{2}[/tex]
Times 3s and t= 3st or 3ts according to the alphabet order
then t times 3s= 3st
lastly t times t = [tex]t^{2}[/tex]
[tex]9s^{2}[/tex]+[tex]3st^{2}[/tex]+[tex]3st^{2}[/tex]+[tex]t^{2}[/tex]= [tex]9s^{2}[/tex]+6st+[tex]t^{2}[/tex]
