Question

for what value of k (k²-4)x² +2x -9 = 0 is not quadratic equation
Plz guys help me fast...tomorrow is my exam

Answer 1

I hope this answer would be helpful for you

Answer 2

⭐️hey there !

we know that quadratic eqn is of type:

➡️ax² + bx + c where a , b, c are constant..

here we can see that degree of this eqn is 2

so if degree of 2 is removed then it's not be a quadratic.

now according to question.

➡️ (k²-4)x² + 2x - 9 = 0

now degree 2 can only be removed if coefficient of x² is zero..

==> (k²-4) = 0

=> k² = 4

=> k = √4 = ±2

so required value of k = ± 2 ans.

______________________________________

Hope it will help u