Question

factorise a^2b^2-a^2-b^2-1​

Answer 1

Answer:

(a-b-1)(a+b+1)

Step-by-step explanation:

a^2-b^2-2b-1

a^2-(b^2+2b+1)

a^2-(b+1)^2

(a-b-1)(a+b+1)

Answer 2

Step-by-step explanation:

$a ^{2} - {b}^{2} - {a}^{2} + 1 \\ = 3 {b}^{2} + {a}^{2} + 1 \\ = {a}^{2} + 3 {b}^{2} + 1$

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