1) 16-m²+2mn-n² = 16 - (m² - 2mn + n²) = 4² - (m - n)² =
= (4 - m + n)*(4 + m - n)
2) a³+ad²+a²d+d³ = a*(a² + d²) + d*(a² + d²) = (a² + d²)*(a + d)
3) m³+10m+5m²+8 = (m³ + 2³) + 5m(m + 2) = (m + 2)*(m² - 2m + 4) +
+ 5m*(m + 2) = (m + 2)*(m² - 2m + 4 + 5m) =
= (m + 2)*(m² + 3m + 4