Question

SOLUCIÓN Multiplicación de polinomios
(a+1)(a−1)(a+1)(a−1)

Answer 1

(a+1)(a−1)(a+1)(a−1) = (a+1)² . (a-1)² = (a²+2a+1) . (a²-2a+1) = 

= a⁴ - 2a³ + a + 2a³ - 4 a² + 2a + a² - 2a + 1 = a⁴ - 3a² - a + 1