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Sigartnyyasdert
a fost răspuns

( ? -2a)^2= ? -16ab+ ?
(4х+ ? )^2= ? +4хy+ ?
(3a- ? )^2= -4ab+ ?
(V45-V5)^2-(V11-V13)(V13+V11)=?
Multumesc mult!!!

Răspuns :

( 4b -2a)²= 16b² -16ab+ 4a²(4х+ y/2 )²= 16x² +4хy+y²/4
(3a-2b/3 )^2= -4ab+ 9a²+4b²/3
(√45-√5)²-(√11-√13)(√13+√11)=45-2·15+5-√143-11+13+√143=22

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