1.

Factorise: 12x2 -27

Answer»

By simplifying further the above equation is 3(4x2 – 9)

By using the formula a2 – b2 = (a+b) (a-b)

Now solving for the above equation

3(4x2 – 9) 

= 3((2x)2 – (3)2)

= 3(2x+3) (2x-3)



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