Ex a , b , c de la 3 pls

a) 2^3 + 3^2 = 8 + 9 = 17
b) 4^3 + 4^0 + 4^2 = 4^2 (4 + 1) + 1 = 16*5 + 1 = 80 + 1 = 81
c) 3^3 - 3^2 + 3 = 3 (3^2 - 3 + 1 ) = 3(9-3+1) = 3*7 = 21