👤


(27. Fie a= [4¹1 (20)20] [216 125- (25)3-5712 +23+ (7+72+73+...+7^2021)^0
b=(41²-82+1):8:5-(26-25 +2²-2°) şi
c=390-4.944 +2208: (2-4103)-5-(922)2.
Calculaţi:
D
a) of + b - 5²;
c) (a + b)(a²- ab + b²);
e) b³-3b²c +3bc²-c³.
b) a +3a²b+3ab² + b³;
d) (b-c)(b²+ bc + ²);
Ajutor


Răspuns :