Maths q (1 Viewer)

[blacktown_]

Find the value of n for which the equation (n+2)x^2 +3x-5=0 has one root triple the other

 

[Carrotsticks]

Let the roots be k and 3k. The sum of roots is 4k, which is also equal to -3/(n+2). The product of roots is 3k^2, which is also equal to -5/(n+2). We can now solve for n and k simultaneously.

 

[blacktown_]

Thanks