Guan Ri Oh's answer to Hew Yuen's Junior College 1 H2 Maths question.

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Guan Ri Oh
Guan Ri Oh's answer
118 answers (Tutor Details)
I am so sorry. I made a mistake which changed my whole explanation into a disaster. I have underlined the mistakes I have made. The idea is still the same, it's just carelessness on my part.