Question

if one root if ax^2+bx+c=0 is double the other then

Answer 1

let the roots be m and 2m

Their sum
$- \frac{b}{a} = 3m$
their product
$\frac{c}{a} = 2 {m}^{2}$

$\frac{c}{a} = 2 \frac{ {b}^{2} }{9 {a}^{2} }$
$9ac = 2 {b}^{2}$

Answer 2

Answer:

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Step-by-step explanation: