Question

exercitiul din poza,va rog frumos​

Answer 1

1/(3-2√2)-1/(3+2√2)=

[3+2√2-(3-2√2)]/[(3-2√2)(3+2√2)]=

(3-3+2√2+2√2)/[3²-(2√2)²]=

4√2/(9-8)=4√2 Bianca