Factorise using appropriate identities : 4y2 – 4y + 1 – InterviewSolution

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1.

Factorise using appropriate identities : 4y2 – 4y + 1

Answer»

4y² – 4y + 1

= (2y)² – 2 (2y) (1) + (1)²

[∵ (x -y)² = x² – 2xy + y²]

= (2y -1)² = (2y – 1) (2y-1)

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