Question

pls answer the pic questions please

Answer 1

if
x+1 and x-1 are factors
then
the polynomial will be zero at
x=1 and x=-1
use it
then you'll get two equations
solve them then you will get your answer
because in the question some term is missing

x⁴+x²+1 is not factorisable

ax⁴+bx³+cx²+dx+e
will be zero at x=1 and x=-1
as x²-1 or (x+1)(x-1)
is its factor
so
a+b+c+d+e = 0
and
a-b+c-d+e = 0
a+c+e = b+d

x¹²-1 = (x-1)(x¹¹+x¹°+...........x⁴+x³+x²+x¹+1)

hope it helps you
@di