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Descompuneti: (x-y)inmultit (x+y)=; 2) (2x-3) (2x+3); 3) (5ab- 4c ) (5ab+4c)=

Răspuns :

(x-y)(x+y)=x²-y²
2)(2x-3)(2x+3)=(2x)²-(3)²
c)(5ab-4c)(5ab+4c)=(5ab)²-(4c)²
sucees