AC Lim's answer to Nicky's Secondary 3 A Maths Singapore question.
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Hope this helps
Date Posted:
4 years ago
I think your part (d) is wrong. -2(-40)=-80 and not -40. But thanks for answering!!
Great answer
Once a while we do have careless mistakes. Last one is 169 after corrections.
Nic, the idea for such questions is that even though a2 + b2 is not equal to (a + b)^2, they are related by a connector 2ab.
Nic, the idea for such questions is that even though a2 + b2 is not equal to (a + b)^2, they are related by a connector 2ab.
Thanks Eric. I’ve actually already found out the answer on my own and got 169. I just chose to point out the mistake just in case anyone referring to hus solution gets confused too.
;)
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