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Doar exercitiul 6,multumesc.

Doar Exercitiul 6multumesc class=

Răspuns :

a=√(4+2√3)=√(4+√12)=√[4+√(16-12)]/2+√[4-√(16-12)]/2=
=√(4+√4)/2+√(4-√4)/2=√(4+2)/2+√(4-2)/2=√3+1

Ix+√3I=a
x+√3 >0
Ix+√3I=x+√3=a
x+√3=√3+1
x=1

x+√3 <0
Ix+√3I=-x-√3=a
-x-√3=√3+1
x=-2√3-1