24 75 = (25 - 1) (25 + 1) = 25^2 - 1^2 = 625 - 1 = 624150 42 = 6 25 7 = 6 5^2 7 = 6 5 5 7 = 30 * 35 = 1050
24 75 = (25 - 1) (25 + 1) = 25^2 - 1^2 = 625 - 1 = 624
150 42 = 6 25 7 = 6 5^2 7 = 6 5 5 7 = 30 * 35 = 1050