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Factorise: 16a2 -144

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Best answer

16a2 -144 can be written as (4a)2 – (12)2

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

Now solving for the above equation

(4a)2 – (12)= (4a+12) (4a-12)

= 4(a+3) 4(a-3)

= 16(a+3) (a-3)

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