Răspuns:
Explicație pas cu pas:
6
a) √3-√2+√3+√2-√3+√2=√3+√2
b)√3-1+2-√3-3+√3=√3-2
c) √2-1+2-√2-2√2=-2√2+1
d)√5-2+3-√5-√5+1=-√5+2
7
a)I√2-1I+I√3-√2I-I1-√3I=√2-1+√3-√2-√3+1=0
b)√5+1+√5-1-√5+2=√5+2
8
a) x=2·3=6
b) x=15·2/√5=30√5/5=6√
c)x=√2(√2-1)/√2(1-√2)=-1
