Question

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Answer 1

Explicación paso a paso:

resolvemos :

$(n - 3)(n + 1) - (n + 3)(n - 5)$

${n}^{2} - n + 3n - 3 - ( {n}^{2} - 5n + 3n - 15)$

${n}^{2} - n + 3n - 3 - {n}^{2} + 5n - 3n + 15$

(n^2-n^2) +( n -3n +5n -3n ) + (-3+15)

$p = 12$

espero te sirva saludos