Q3 of 274 Page 69

Factorize:

x2 + 7x – 18

We have,



Now by using middle-term splitting, we get


= x2 + 9x - 2x - 18


= x (x + 9) - 2 (x + 9)


= (x + 9) (x - 2)


Hence,


The given expression can be factorized as:



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