Q4 of 51 Page 36

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

More from this chapter

All 51 →
2

Which of the following is not a quadratic equation?

 3

Which of the following equation has 2 as a root?

 5

Which of the following equations has the sum of its roots as 3?

 6

Value(s) of k for which the quadratic equation 2x2 – kx + k = 0 has equal roots is/are