(b-5)(b+5)
(8-3a)(8+3a)
(9a-b)(9a+b)
(9a-8b)(9a+8b)
b² - 25=(b-5)(b+5)
64 - 9a²=(8-3a)(8+3a)
81a² - b²=(9a-b)(9a+b)
81a² - 64b²=(9a-8b)(9a+8b)
(b-5)(b+5)
(8-3a)(8+3a)
(9a-b)(9a+b)
(9a-8b)(9a+8b)
b² - 25=(b-5)(b+5)
64 - 9a²=(8-3a)(8+3a)
81a² - b²=(9a-b)(9a+b)
81a² - 64b²=(9a-8b)(9a+8b)