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secondary 3 | A Maths
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elly
Elly

secondary 3 chevron_right A Maths chevron_right Singapore

thx

Date Posted: 1 year ago
Views: 292

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Farhana Banu
Farhana Banu's answer
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Hope this helps! :)
elly
Elly
1 year ago
uhm i checked the ans and A is actually 5 idk how they get it :P
Farhana Banu
Farhana Banu
1 year ago
Hi the answer key must be wrong, A = 2 is the right answer.

If you check the workings again, when we expand the brackets, we only get one x^3 term, which is Ax^3.

So by comparing coefficients, A must be 2.

Hope this helps! ^^
elly
Elly
1 year ago
yup i noticed too tyy :D