Factorize:
5x2 – 16x – 21
We have,
Now by using middle-term splitting, we get
= 5x2 + 5x - 21x - 21
= 5x (x + 1) - 21 (x + 1)
= (x + 1) (5x - 21)
Hence,
The given expression can be factorized as:
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