1.

Factorise:a3 – 4a2 + 12 – 3a

Answer»

a3 – 4a2 + 12 – 3a 

= a2 (a – 4) – 3a + 12 

= a2 (a – 4) – 3 (a – 4) 

= (a – 4) (a2 – 3)



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