Working and explanation pls, confused + ignore my 2nd question's working

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secondary 2 | Maths
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secondary 2 Maths Singapore

Working and explanation pls, confused
+ ignore my 2nd question's working

Date Posted: 4 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Hopefully it's clear. Q5 you are close to the answer :)

Date Posted: 4 years ago