Question

find the value of a if x-a is a factor of x4-x3-2x2-x-a.


plz it's very urgent ​

Answer 1

Answer:

a=0

Step-by-step explanation:

Let f(x) = x4-a2x2+3x-a

(x+a) is a factor of f (x)

f (-a) = 0

(-a)4-a2(-a)2+3(-a)-a = 0

a4-a4-3a-a = 0

-4a = 0

a = 0

Answer 2

Answer:

p(x)= x4- x3- 2x2 - x- a

x - a = 0

=x= a

p(a)= a4- a3- 2a2- a-a

= 4a - 3a -4a -2a

= 1a - 6a

=5a