Question

Diferencia de cuadrados a²-1

Answer 1

$a^{2} - 1 = {a}^{2} - {1}^{2} = (a + 1)(a - 1) \\ \\ {x}^{2} - 25 = {x}^{2} - {5}^{2} = (x + 5)(x - 5) \\ \\ {x}^{2} - {11}^{2} = (x + 11)(x - 11)$