a) x= 3 + 3- (3^18:3^17) x (2^30:2^30)
x= 3+3-3x3^0
x=3+3-3
x=3
y=3 x(5+2x3-2430:405)
y=3x(5+6-6)
y=3x5
y= 15
b) 3+15= 18
15-3=12
(3^15):(3^2)^7
(3^15):(3^14)=3
c) 15 : 2 = 7 + 1
7 : 2 = 3 + 1
3 : 2 = 1 + 1
1 : 2 = 0 + 1
15(baza10) = 1111(baza2)
Sper că te-am ajutat!