Factorise 8a^3 +√ 27b^3

1.	Factorise 8a^3 +√ 27b^3
Answer» a3 + b3 = (a + b) (a2 - ab + b2 )8a3 + √27b3 = (2a)2 + (√3b)3= (2a + √3b) [(2a)2 - (2a) (√3b) + (√3b)2]= (2a + √3b) (4a2 - 2√3ab + 3b2)

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