Question

paso a paso de esta ecuacion
(a + 3)(a + 1) – 4 (a + 1)

Answer 1

Respuesta:

(a + 3)(a + 1) – 4 (a + 1)

(a + 3) (a + 1):a²+4a+3

=a² + 4a + 3 -4(a + 1)

-4(a + 1): -4a -4

=a² + 4a + 3 - 4a - 4

a² + 4a + 3 - 4a - 4 : a² - 1

= a² - 1

.RPTA:

=a² - 1