(17-15)^3 · 2^2 · 2^1 - 7^2

Răspuns :

(17-15)^3 · 2^2 · 2^1 - 7^2 =

= 2^3 × 4 × 2 - 49 =

= 8 × 8 - 49 =

= 64 - 49 =

= 15