Question

Am nevoie urgentă de ajutor , vă rog.

Answer 1

38 a) √9+√80=

=√(2+√5) ^2=

=2+√5

b) √10+√84=

=√(3+√7) ^2=

=√3+√7

c) √11+6√2=

=√(3+√2) ^2=

=3+√2

d) √11-√72=

=√(3-√2)^2=

=3-√2

e) √10-4√6=

=√(2-√6) ^2=

=√6-2

f) √15-6√6=

=√(3-√6) ^2=

=3-√6

39 a) √2+√6-√32=

=√2-√6-4√2=

=√2-√(2-√2) ^2=

=√2-(2-√2) =

=√2-2+√2=

=2√2-2

b) √13+4√3-√12=

=√(1+2√3) ^2-2√3=

=1+2√3-2√3=

=1

c) √10+√96-√15+√216=

=√10+4√6-√15+6√6=

=√(2+√6) ^2-√(3+√6) ^2=

=2+√6-(3+√6) =

=2+√6-3-√6=

= -1

d) √7-4√3+√4+2√3=

=√(2-√3) ^2+√(1+√3) ^2=

=2-√3+1+√3=

=3