Răspuns:
a) 5
b) 0(cred)
c)0
sper ca te am ajutat
(√2+√3)^2=(√2)^2+2*√2*√3+(√3)^2=√4+2√6+√9=2+3+2√6= 5+2√6
(√2+√3)(√2-√3)=2-3= -1
(√2+√3)^2-(√2-√3)^2=5+2√6-(5-2√6)=5+2√6-5+2√6= 4√6
Explicație pas cu pas:
