Barry Tan's answer to Puay Xin yue's Secondary 3 E Maths Singapore question.

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Barry Tan
Barry Tan's answer
128 answers (Tutor Details)
1st
Ok!
Eric Nicholas K
Eric Nicholas K
4 years ago
Good method, but E Maths students do not learn the property that the product of the gradients of two perpendicular lines is equal to -1. This property is only learnt in A Maths.

Sadly it is hard to say whether there are other approaches available for this question or not, and I am unable to tell whether the question comes from an E Maths textbook or an A Maths textbook.
Barry Tan
Barry Tan
4 years ago
Oops sorry about that haha
I’m just randomly helping