Question

Ee urgentt ex 1,2 de jos repede cu tot cu rezolvări dau coroană repedee vă rogg

Answer 1

(1/3rad5 + 3/rad5) • 1/2 = (1+9)/3rad5 • 1/2 = 10rad5/15 • 1/2 = 2rad5/3 • 1/2 = rad5/3

rad[(9+3rad5)(9-3rad5)]=

rad(81-45)=

rad36=

6