1.

Factorise by re joining1+a²b²+a²+b²​

Answer»

ANSWER:

(1+a²)(1+b²)

Step-by-step EXPLANATION:

1+a²b²+a²+b²

= 1+a²+a²b²+b²

= (1+a²)+b²(a²+1)

= (1+a²)(1+b²)



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