Factorise 5y²+5y-10 – InterviewSolution

1.

Factorise 5y²+5y-10

Answer»

5y²+5y-10

= 5 (y² + y - 2)

= 5 (y² + 2Y - y - 2)

= 5 { y(y+2) - 1(y+2) }

= 5 { (y+2) (y-1)

= 5 (y+2) (y-1)

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