Răspuns:
Explicație pas cu pas:
a) 36 = 6² → patrat perfect
b) 7⁴ = ( 7² )² = 49² → patrat perfect
c) 3² x 9 = 9 x 9 = 9² → patrat perfect
d) 17²⁰ = ( 17¹⁰ )² → patrat perfect
e) 2⁵ x 8⁷ = 2⁵ x 2⁽³ˣ⁷⁾ = 2⁽⁵⁺²¹⁾ = 2²⁶ = (2¹³)² → patrat perfect
sau:
= ( 2⁵ x 8⁵ ) x 8² = ( 2 x 8)⁵ x 8² = 16⁵ x 8² =
= 4²ˣ⁵ x 8²=
= ( 4⁵ x 8)² → patrat perfect
f) 3⁹ x 27⁵ = 3⁹ x 3⁽³ˣ⁵⁾ = 3⁽⁹⁺¹⁵⁾ = 3²⁴ = (3¹²)² → patrat perfect
