Question

find the value of k if the root of x square + kx + 12 is equal to zero are in the ratio 1 :3​

Answer 1

Since the roots of the equation are in ratio

1: 3

So,

Sum Of zeroes =

$\frac{ - b}{a}$

$\frac{1}{3} = \frac{ - k}{1 } \\ k = - 3$