Question

ayuda xfa explicación paso a paso
:'(​

Answer 1

Respuesta:

$x㊙y = {x}^{2} - {y}^{2} + 2 \\ 13㊙a = 2 \\ {13}^{2} - {a}^{2} + 2 = 2 \\ 169 + 2 - 2 = {a}^{2} \\ 196 = {a}^{2} \\ \sqrt{169} = a \\ 13 = a$