- #1
olee
- 24
- 0
Homework Statement
One root of 2x2-kx+k=0 is twice the other. Find K. (assume k is not 0)
Homework Equations
not sure what this means.
The Attempt at a Solution
[tex]\alpha[/tex]+[tex]\beta[/tex]=[tex]\frac{-b}{a}[/tex]
[tex]\alpha\beta[/tex]=[tex]\frac{c}{a}[/tex]
then i tried
[tex]\alpha[/tex]=2[tex]\beta[/tex] then substituted in..
2x2-3[tex]\beta[/tex]+[tex]\alpha\beta[/tex]=0 and now I am stuck
im not sure if this is right way to do this