agarwalmanoj2000 wrote:

Thanks, Fluke !!!

Sorry, I did not understand

.

Can you please provide some more details?

Thank you in advance.

@lalab

Thanks for your response. I am trying to find problem in my approach.

ax^2+bx+c=0. This is a polynomial of degree 2, where

D=b^2-4acFor a polynomial of degree 4, i.e. maximum power of x, falls in a different category:

ax^4+bx^2+c=0. This is a polynomial of degree 4, for which

D = b^2-4ac may not hold true.

The question is asking about:

x^4 - 2x^2 +1=0. The maximum power of x is 4. You just don't know what is the discriminant. The discriminant formula you used is only for quadratic equations(x with highest power of 2).

For a quadratic equation, your approach would be correct.

_________________

~fluke