Răspuns:
[tex]+\frac{11}{76}[/tex]
Explicație pas cu pas:
[tex](\frac{1}{5} - \frac{3}{4} )*(\frac{-10}{38} ) = (\frac{4-15}{20} )*(\frac{-10}{38} ) = \frac{-11}{20} *\frac{-10}{38} =+ \frac{11}{76}[/tex]
