Решение:
a² - b² = (a - b)(a + b), где a = 7² и b = 1:\[ 7^4 - 1 = (7^2)^2 - 1^2 = (7^2 - 1)(7^2 + 1) \]
\[ (49 - 1)(49 + 1) \]
\[ 48 \times 50 \]
48 = 2 \(\times\) 2 \(\times\) 2 \(\times\) 2 \(\times\) 3 = 2^4 \(\times\) 350 = 2 \(\times\) 5 \(\times\) 5 = 2 \(\times\) 5^2\[ 48 \times 50 = (2^4 \times 3) \times (2 \times 5^2) = 2^5 \times 3 \times 5^2 \]
Ответ: 2⁵ × 3 × 5²