Eric Nicholas K's answer to Ong Jia Zhi's Secondary 4 A Maths Singapore question.
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Something like this would be good.
The other method would be to use the 'sum-to-product' identities (which the other tutor has used in the workings).
The other method would be to use the 'sum-to-product' identities (which the other tutor has used in the workings).
Date Posted:
5 years ago
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