Gerry Lim's answer to gwen's Secondary 3 A Maths Singapore question.

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Gerry Lim
Gerry Lim's answer
33 answers (Tutor Details)
Part ii. Idea is to use x=2 and x=-2 first to get values for A and B. Then compare the coefficients of the x^3 and x^1 terms for C and D.