Разложи на множители (c+24d)2−(24c+d)2

(c + 24d)² — (24c + d)² = (c + 24d + 24c + d)(c + 24d — 24c — d) =

= (25c + 25d)(23d — 23c)= 25 * 23 * (c + d)(d — c) = 575(c + d)(d — c)