3 × ( 3² + 3³ ) =
3 × [ ( 3 × 3 ) + ( 3 × 3 × 3 ) ] =
3 × [ 9 + ( 3 × 3 × 3 ) ] =
3 × [ 9 + ( 9 × 3 ) ] =
3 × ( 9 + 27 ) =
3 × 36 =
108
Răspuns:
Este 108.
3×(3²+3³)
Calculăm puterile:
3²= 3•3=9
3³= 3•3=9•3=27
3×(27+9)
27+9=36
36×3=108
