Question

Математика.

Даю 15 баллов.

Answer 1

${(16 {x}^{2} + 1)}^{2} - {64x}^{2} = {(4x + 1)}^{2} {(4x - 1)}^{2}$

${m}^{2} + mn - m - am - an + a = (m - n)(m + a - 1)$

$3a + 15 = 3(a + 5)$