Question

help, help, help!!!!!!!!!!!!​

Answer 1

a= 4 + 8 + 16 = 28

a^2= 28×28= 784

Answer 2

Salut!

$a = 2^{2} + 2^{3} + 2^{4} \\a = 4 + 8 + 16\\a = 28\\a^{2} = 28^{2} = 28 * 28 = 784$

Sper ca te-am ajutat!