1.

Factories: 16x5 – 144x3

Answer»

We have, 

16x5 – 144x3 

= 3x3(x2 – 9) 

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

We get, 

16x5 – 144x3 = 3x3(x2 – 9) 

= 16x3{(x)2 – (3)2

= 16x3(x + 3)(x – 3)



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