Question

a2-2+1/a2 factorise​

Answer 1

Answer:

a²-2a²-1/a²

2a²-2a²-1/a²

1/a²

Answer 2

Step-by-step explanation:

just replace 2 and place it in the end

so it will give a2 +1/a2 -2

this is the expanded formula of

(a+1/a) square

so this is the answer

or

just make the eq like this

a2 + 1/ a2 + 2 -4 ( 4- +2 =-2)

now a2+1/a2 + 2 is expanded form of (a+1/a) square. and

-4= -(2 square)

therefore it's (a+1/a)² -2²

= (a+1/a -2)(a+1/a+2)