Respuesta :

Answer:

a = 8

Step-by-step explanation:

Backtrack with synthetic division and solve for "a":

1 | 2  -a  4   2   1

____ 1_-7  -3 -1

   2   -7 -3 -1 | 0

-a + 1 = -7

-a = -8

a = 8

Otras preguntas