need help with this qn, pls explain too

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

need help with this qn, pls explain too

Date Posted: 3 years ago

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Date Posted: 3 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Date Posted: 3 years ago