Question

Rationalizati numitorii:

a) $\frac{6}{ \sqrt{2}+5 }$

b) $\frac{7}{ \sqrt{3} - \sqrt{7} }$

c) $\frac{4}{5-3 \sqrt{2} }$

Answer 1

A)se rationalizeaza cu 5-rad (2) 6×(5-rad (2))/25-2=30-6 rad (2)/23 B)se rationalizeaza cu rad3+rad7 7rad3+7rad7/-4=-7rad3-7rad7/4 C) se rationalizeaza cu 5+3 rad din 2 4x (5-3rad2)/(25-18)=(20-12rad2)/7