Is the polynomial x4−2x2+1 a perfect square? If yes, factorize it.
This trinomial can be factored as (a−b)2, which in this case gives (x2−1)2
Step 1 :First, we rewrite the polynomial as (x2)2−2(x2)+1
Step 2 :We notice this is a perfect square trinomial of the form a2−2ab+b2, where a=x2 and b=1.
Step 3 :This trinomial can be factored as (a−b)2, which in this case gives (x2−1)2