[tex](1 \frac{1}{2} ) {}^{2} + (2 \frac{2}{3} ) {}^{2} = (\frac{3}{2} ) {}^{2} + ( \frac{8}{3} ) {}^{2} = \frac{9}{4} + \frac{64}{9} = \frac{337}{36} = 9 \frac{13}{36} [/tex]