Question

упростите выражение умоляю

Answer 1

а) $sqrt{7} +frac{21}{sqrt{7}} = frac{7+21}{sqrt{7}}=frac{28}{sqrt{7}}$

б) $(frac{6}{sqrt{2}}+sqrt{2})*sqrt{2}=frac{8}{sqrt{2}} *sqrt{2} =8$

в) $frac{18}{sqrt{3}} - 5sqrt{3} =frac{3}{sqrt{3}}$

г) $(frac{2}{sqrt{18}} -sqrt{2}):frac{sqrt{2}} {3} =frac{-4}{sqrt{18}}*frac{3}{sqrt{2}}  =-frac{12}{6} =-2$