Factorize:

a2 – b2 –4ac + 4c2

We have,



= a2 – 2(a)(2c) + c2 – b2


= (a – c)2 – (b)2]


Now,


Using identity: a2 – b2 = (a – b)(a + b)



Hence,


The given expression can be factorized as:


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