👤

efectueaza 1+2√3-5 b)√5-3+2√5 c)2√7-1-2√7

Răspuns :

a) 1-5+2√3= -4+2√3
b) √5+2√5-3= 3√5-3= 3(√5-1)
c) 2√7-2√7-1= -1