$11.35 imesleft(-frac{2}{3} ight)^{2}+2.1 imesleft(-frac{2}{9} ight)-7.7 imesleft(frac{-4}{3^{2}} ight)$
$egin{aligned} & 11.35 imes frac{4}{9}+2.1 imesleft(-frac{2}{9} ight)-7.7 imesleft(-frac{4}{9} ight) \=& 11.35 imes frac{4}{9}-2.1 imes frac{2}{9}+7.7 imes frac{4}{9} \=& 11.35 imes 2 imes frac{2}{9}-2.1 imes frac{2}{9}+7.7 imes 2 imes frac{2}{9} \=& 22.7 imes frac{2}{9}-2.1 imes frac{2}{9}+15.4 imes frac{2}{9} \=&(22.7-2.1+15.4) imes frac{2}{9} \=& 36 imes frac{2}{9} \=& 8 end{aligned}$