1.

Factorise : 3a2b - 12a2 - 9b + 36

Answer»

3a2b - 12a2 - 9b + 36

3a2(b - 4) - 9(b - 4)

= (b - 4) (3a2 - 9) = (b - 4) 3(a2 - 3)

= 3(b - 4) (a2 - 3)



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