X-a is a factor of
Here, the degree of polynomial is = 6.So, this polynomial has 6 roots.
P(a) = 0 ( If we insert a in place of x we get 0 remainder , because a factor completely divides it divident )
x-a = 0
x = a
Insert x at the place of a.
2a - 2 = 0
2a = 2
a = 1Therefore , first root is x - 1.
Now, to find second root divide x-1 by
You will have a quotient.
Now, again insert x = a and find the value of a .
Whatever will be the value would be the value of a.
I hope it helps .