Răspuns:
123 nu este pătrat
10.
[tex]2 \times (14 - 2( {3}^{2} - {2}^{3} )) = 2 \times (14 - 2(9 - 8) = 2 \times (14 - 2) = 2 \times 12= 24[/tex]
[tex]2 \times (14 - 2) \times {3}^{2} - {2}^{3} = 2 \times 2 \times 9 - 8 = 36 - 8 = 26[/tex]
[tex]2 \times 14 - 2 \times ( {3}^{2} - {2}^{3} ) = 24 - 2 = 22[/tex]