Q30 of 274 Page 69

Factorize:

2x2 – x – 21

We have,



Now by using middle-term splitting, we get


= 2x2 + 6x - 7x - 21


= 2x (x + 3) - 7 (x + 3)


= (x + 3) (2x - 7)


Hence,


The given expression can be factorized as:



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