Hello :)The first thing you want to do is use foil F- first O- outer I-inner L-last Lets start with F ( first)6 Γ 3 = 18Now, lets do O (outer)6 Γ 2β10 = 12β10how to do it ?(6Γ2=12 and keep β10)Then, we are going to do I ( inner)(-β5) Γ 3= -3β5how to do it ?remove the parenthesis -β5 Γ 3= -3β5Lastly, we are going to do L (last)(-β5) Γ 2 β10= -10β2how to do it ?remove the parenthesis from (-β5), then factor 2 β10-β5 Γ 2[tex]\sqrt{5*2}[/tex]-β5 Γ 2 β5β2there are two 5's so we use our radical rule βaβa=a-2 Γ 5β2=-10β2The last thing you have to do is put them all together18+12β20-3β5-10β2