Question

exercitiul 2 va rog mult

Answer 1

$\frac{5}{2}- \frac{9}{4} :(1- \frac{7}{4})= \frac{5}{2}- \frac{9}{4}:( \frac{4}{4}- \frac{7}{4})= \frac{5}{2}- \frac{9}{4} :(- \frac{3}{4} )= \\ \\ \frac{5}{2}- \frac{9}{4} (- \frac{4}{3})= \frac{5}{2}+ \frac{36}{12}= \frac{5}{2}+3= \frac{11}{2}=5 \frac{1}{2}$