Factorise 2y3+y2 -2y-1 – InterviewSolution

1.

Factorise 2y3+y2 -2y-1

Answer»

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$\text{[math]}$

2Y 3 +y 2 −2y−1

=y 2 (2y+1)−1(2y+1)

=(2y+1)(y 2 −1)

=(2y+1)(y+1)(y−1)

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