Answer
-$\frac{21}{121}$
Work Step by Step
($\frac{2}{11}$ + $\frac{5}{11}$ )$\times$($\frac{2}{11}$ - $\frac{5}{11}$ )=
=($\frac{2+5}{11}$ )$\times$ ($\frac{2-5}{11}$) =
=$\frac{7}{11}$ $\times$$\frac{-3}{11}$ =
=$\frac{7\times(-3)}{11\times11}$ =
-$\frac{21}{121}$
