Răspuns:a)49
b)27
Explicație pas cu pas:
a) [1428:7-(234-44:2):2]:2= [204-(234-22):2]:2= (204-212:2):2= (204-106):2= 98:2= 49
49 e 7 la patrat => numarul e patrat perfect
b) [(600+1500:3):11-(15×28-380):2]-53= [(600+500):11-(420-380):2]-53= (1100:11-40:2)-53= (100-20)-53= 80-53= 27
27 e 3 la a treia => nr e cub perfect