Phylicia Tong's answer to Georgia Jansen's Secondary 3 A Maths Singapore question.

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Phylicia Tong
Phylicia Tong's answer
192 answers (A Helpful Person)
Hope this helps
Phylicia Tong
Phylicia Tong
7 months ago
Oops should be (3) - (2). U can also substitute directly fr (1) into (2).