Răspuns:
[tex]\frac{7}{2} , \frac{17}{8\\}[/tex]
Explicație pas cu pas:
[tex]a=3\\b=5\\[/tex]
[tex]\frac{3a+b}{3a-b} =\frac{3*3+5}{3*3-5} =\frac{9+5}{9-5} =\frac{14}{4} =\frac{7}{2} \\\frac{b^{2}+a^{2} }{b^{2} -a^{2} } =\frac{5^{2}+3^{2} }{5^{2} -3^{2} } =\frac{25+9}{25-9} =\frac{34}{16} =\frac{17}{8}[/tex]
