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Buna cineva imi calculeaza: (vreau si procedura)
1.
(1+√5)²+(√5-1)²+(2-√3)(2+√3)=

2.
(√3-√2)²-(1-√6)²+(√5+√2)(√5-√2)=

3.
(√7-1)²-(1-√7)²+3=

4.

5 + 2 =
—————– —–—–——
(√2-√3)(√2+√3) (√5-1)(√5+1)


Răspuns :

(a+b) la patrat = a la patrat + 2ab+b la patrat