## Question

secondary 3 | A Maths

Anyone can contribute an answer, even non-tutors.

##### Chen Hong

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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 months ago
Views: 63
5 months 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?
5 months ago
It's ok I know what you meant
Chen Hong
5 months ago
I was like trying to get an equation to minus off another equation but i like kept going in circles
Chen Hong
5 months ago
But how did a - b= 2?
5 months 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
5 months ago
Ahhhhhhh, okay Thannk you
5 months ago