Question

Va rog ajutor!!!Repede!​

Answer 1

Duci prima data la o forma simpificata radicalii

$\sqrt{0,8(3):1,2}=\sqrt{\frac{83-8}{90} :\frac{12}{10} }=\sqrt{\frac{75}{90}*\frac{10}{12} }=\sqrt{\frac{25}{9*3} } =\sqrt{\frac{25}{27}}=\frac{5}{3\sqrt{3} }=\frac{5\sqrt{3} }{9}$

$\sqrt{1\frac{40}{81} }=\sqrt{\frac{1*81+40}{81} }=\sqrt{\frac{121}{81} }=\frac{11}{9}$

$\sqrt{0,49} =\sqrt{\frac{49}{100} } =\frac{7}{10}$

Rezolvarea

$[\frac{5\sqrt{3} }{9} -\frac{11}{9}]:\frac{7}{10} =\frac{5\sqrt{3}-11 }{9}*\frac{10}{7}= \frac{50\sqrt{3} -110}{63}$