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[tex](8 + y) \times (8 - y) - (64 + 3y {)}^{2} [/tex]


Răspuns :

(8+y)(8-y)-(64+3y)²=64-y²-(4096+384y+9y²)=64-y²-4096-384y-9y²=
=-10y²-384y-4032