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secondary 3 | A Maths
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Chen Hong
Chen Hong

secondary 3 chevron_right A Maths chevron_right Singapore

Its the chapter on sum and products of roots. I dont know the how the working should go and how to start. Pls help me with the working~

Date Posted: 5 months ago
Views: 37

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Chua Tze Ren
Chua Tze Ren's answer
15 answers (Tutor Details)
1st
This question isn't that difficult, but your working can get quite messy because there will be several sets of values so if faced with such a question in future, you need to be very careful to not make any careless miscalculations. Hope this helps!
Chen Hong
Chen Hong
5 months ago
For the ① , isnt -(-13÷4)just for alpha plus beta? How did it became the answer for alpha²+beta², and later 13÷2 for (alpha+beta)²- 2(aplha×beta)? Same qns similiarly to ②.
Chua Tze Ren
Chua Tze Ren
5 months ago
For equation 1, note how the question said that the roots of the equation were alpha SQUARE and beta SQUARE. Hence, the value -(-13/4) is alpha square plus beta square and not alpha plus beta.
Chua Tze Ren
Chua Tze Ren
5 months ago
Don't understand part ii of your question though as there isn't any -13/2 anywhere in it.