Question

Problema de jos ajutor 

Answer 1

$\frac{2}{3}( \sqrt{7} -2)( \sqrt{7}+2)= \frac{2}{3} ( (\sqrt{7})^2-(2^2))= \frac{2}{3}(7-4)= \frac{2}{3} *3= \frac{6}{3} =2$

Answer 2

A=2/3(7-4)
A=2/3 ori 3
3 cu 3 se reduc si ramane 2
A=2