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a fost răspuns

CALCULATI

a) (√3+2)²+4×(5-√3)-(2√7-3)×(2√7+3)

b) 2 4
----- - ------ +(√5-1)²
√3 √5

Răspuns :

(√3+2)²+4×(5-√3)-(2√7-3)×(2√7+3)=
=3+4√3+4+20-4√3-(4*7-9)=
=3+4+20-(28-9)=
=3+4+20-19=
=8

2/√3-4/√5 +(√5-1)²=
=2√3/3-4√5/5+5-2√5+1=
=2√3/3-14√5/5+5+1=
=2√3/3-14√5/5+6=

Alte intrebari