Question

For what value of k,(k^2-4)x^2+2x-9=0 cannot be quadratic equation? ​

Answer 1

Answer:

k = ± 2

Solution:

The given equation is;

(k² - 4)x² + 2x - 9 = 0

Here,

If the coefficient of x² becomes zero , then the given equation will not be a quadratic equation.

Moreover,

If the coefficient of x² becomes zero , then the given equation will become a linear equation.

Thus,

The condition for the given equation not to be quadratic is k² - 4 = 0

=> k² - 4 = 0

=> k² = 4

=> k = √4

=> k = ± 2

Hence,

If k = ± 2 , then the given equation cannot be a quadratic equation .