Question

Factorise : 2y³ + y2 – 2y - 1 by hit and trail method​

Answer 1

Answer:

$2 {y}^{3} + {y}^{2} - 2y - 1 \\ \\ 2y( {y }^{2} - 1) + {y}^{2} - 1 \\ \\ ({y}^{2} - 1)(2y + 1)$