I need help with 31ii)! Thank you ;)

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secondary 4 | A Maths
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secondary 4 A Maths Singapore

I need help with 31ii)! Thank you ;)

Date Posted: 3 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Date Posted: 3 years ago

3 years ago

Shouldnt it be 16 -4n(2-n)?