Listen NCERT Audio Books to boost your productivity and retention power by 2X.
Show that the polynomial f(x) = x4 + 4x2 + 6 has no zero.
Let us assume t = x2
∴ f (t) = t2 + 4t + 6
Now first of all we have to equate f (t) = 0 in order to find the zeros
∴ t =
=
= - 2
As, t = x2
So, x2 = - 2
x =
We know that, the zeros of the polynomial should be a real number and this is not a real number
∴ f (x) hs no zeros