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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

The qns is, x² - 4x+c=0 has roots which differ by 2. Find the value of (i)each root, (ii)the constant of c.
Its on the chapter sum and product of equation. The working started off okay, but i dont know how to get the equation to find just for alpha or beta.

Date Posted: 5 days ago
Views: 5
Mathaddict100
Mathaddict100
5 days ago
Your working seems wrong..Looks like I have to redo th qn for you..I don't get you..Are you trying to find an equation based on the roots or find the alpha and beta individually?
Mathaddict100
Mathaddict100
5 days ago
It's ok I know what you meant
Chen Hong
Chen Hong
5 days ago
I was like trying to get an equation to minus off another equation but i like kept going in circles
Chen Hong
Chen Hong
5 days ago
But how did a - b= 2?
Mathaddict100
Mathaddict100
5 days ago
Oh ok that's not how you do it..a-b=2 because the qn itself says that you have roots that differ to each other by 2..So i let alpha (a) be greater than beta (b)..Conversely,You can let beta be greater if you want..It's your choice but in the end,either one of the roots must be greater by 2..Hope you get it..
Chen Hong
Chen Hong
5 days ago
Ahhhhhhh, okay Thannk you
Mathaddict100
Mathaddict100
5 days ago
Your welcome :)

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Mathaddict100
Mathaddict100's answer
220 answers (A Helpful Person)
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These are corrected steps..If you have any doubts regarding the chapter,do raise it.Hope it helps.. :)
Mathaddict100
Mathaddict100
5 days ago
*These are the corrected steps*