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Question
Factorise.
5y2 + 5y − 10
Sum
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Solution
5y2 + 5y − 10
= 5y2 + 10y − 5y − 10
= 5y (y + 2) − 5(y + 2)
= (5y − 5) (y + 2)
= 5(y − 1) (y + 2)
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