Better Students Ask More Questions.
Q. If one root of the equation `x^2-3ax+f(a)=0` is double of the other,then `f(x)` =?...
1 Answer | add yours
Let one of the roots of the equation `x^2-3ax+f(a)` be p, and the other root is 2p.
Then the equation can be written as: `(x-p)(x-2p)=0`
Comparing the coefficient of `x` , we get
Again, comparing the constant term,
Hence option C) is correct.
Posted by llltkl on August 16, 2013 at 5:28 PM (Answer #1)
Join to answer this question
Join a community of thousands of dedicated teachers and students.