Explicație pas cu pas:
[tex]a = \frac{1}{2} \times \frac{4}{3} - \frac{1}{3} \times \frac{6}{5} - {( - \frac{2}{3} )}^{2} = \frac{2}{3} - \frac{2}{5} - \frac{4}{9} = \frac{2 \times 15 - 2 \times 9 - 4 \times 5}{45} = \frac{30 - 18 - 20}{45} = \frac{30 - 38}{45} = - \frac{8}{45} [/tex]
[tex] |a| = | - \frac{8}{45} | = \frac{8}{45} [/tex]
