Question

[( - $\frac{2}{5}$ +$\frac{1}{2}$ -$\frac{1}{3}$ ) : $\frac{7}{15}$ $]^{3}$ + $\frac{1}{8}$ =

Answer 1

aducem la acelasi numitor in paranteza; numitorul va fi 30
$(\frac{-12}{30} + \frac{15}{30}- \frac{10}{30} )* \frac{15}{7} )^3+ \frac{1}{8}$
$( \frac{-7}{30} * \frac{15}{7} )^3+ \frac{1}{8} =( \frac{-1}{3} )^3+ \frac{1}{8} = \frac{-1}{8} + \frac{1}{8} =0$