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descompuneti in factori (3a-5)²-16²​

Răspuns :

ai formula a^2-b^2= (a-b)(a+b) de unde a=3a-5 si b= 16

(3a-5-16)(3a-5+16)= (3a-21)(3a+11)= 3(a-7)(3a+11)

Succes!