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A) 3(3x+2y-6)-5(4x-3y-2)+7(3x-5y-1) = ?

Răspuns :

3(3x+2y-6)-5(4x-3y-2)+7(3x-5y-1) =
9x+6y-18-20x+15y+10+21x-35y-7 =
10x-14y-15.




J'espère aidé :)