Question

factorise: (a²+1)(x²-1)-a²(a²+2)x​

Answer 1

Answer:

Step-by-step explanation:

(a²+1)(x²-1)-a²(a²+2)x

Let a²+1=k

So the polynomial becomes

Kx²-(k²-1)x-k

=Kx²-k²x+x-k

=Kx(x-k)+1(x-k)

=(x-k)(Kx+1)