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secondary 3 | A Maths
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reyes lim
Reyes Lim

secondary 3 chevron_right A Maths chevron_right Singapore

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Date Posted: 4 years ago
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Truong Dong Hung
Truong Dong Hung's answer
11 answers (Tutor Details)
1st
For 2 line: y= ax + b and y = px + q, if they are perpendicular, we have: a*p = -1