Neo Yu Shan's answer to blehhhh's Secondary 4 E Maths Singapore question.
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Hope this helps
Date Posted:
5 years ago
I doubt sec 4 students learn inverses in their syllabus though.
I think they do. I learned this in sec4
As far as I recall, when I learned matrices back then, it was inside the syllabus. But that was more than 10 years ago.
How else can we solve this without inverse?
We have to call C as (a b c d) and solve some simuls.
Ah right. But that would be 4 equations 4 unknowns. I think they learn 2 equations 2 unknowns only
Two equations will be in terms of a and c only while the other two equations will be in terms of b and d only (if I can remember).
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