Q6 of 274 Page 69

Factorize:

x2 – 21x + 108

We have,



Now by using middle-term splitting, we get


= x2 - 12x - 9x + 108


= x (x -12) - 9 (x -12)


= (x -12) (x - 9)


Hence,


The given expression can be factorized as:



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