If 
is a root of the equation 
, then the value of k is
If 
is a root of the equation
x2 + kx - 
= 0 then, substituting the value of 
in place of x should give us the value of k.
Given, x2 + kx - 
= 0 where, 
⇒ 
⇒ 
∴ k = 2
5
If is a root of the equation , then the value of k is
If is a root of the equation
x2 + kx - = 0 then, substituting the value of in place of x should give us the value of k.
Given, x2 + kx - = 0 where,
⇒
⇒
∴ k = 2