factorise:
![2y {}^{3} + y {}^{2} - 2y - 1 2y {}^{3} + y {}^{2} - 2y - 1](https://tex.z-dn.net/?f=2y+%7B%7D%5E%7B3%7D++%2B+y+%7B%7D%5E%7B2%7D++-+2y+-+1)
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Step-by-step explanation:
hope this helps you...
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