Q10 of 274 Page 69

Factorize:

40 + 3x – x2

We have,



Now by using middle-term splitting, we get


= 40 + 8x – 5x – x2


= 8 (5 + x) – x (5 + x)


= (5 + x) (8 – x)


Hence,


The given expression can be factorized as:



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