Consider the equation \( x^{4}-\lambda x^{2}+9=0 \). This can be so...

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Consider the equation \( x^{4}-\lambda x^{2}+9=0 \). This can be solved by substituting \( \mathrm{x}^{2}=\mathrm{t} \) such equations are
\( \mathrm{P} \) called as pseudo quadratic equations.

W. If the equation has no real root, then \( \lambda \) lies in the interval
(A) \( (-\infty, 0) \)
(B) \( (-\infty, 6) \)
(C) \( (6, \infty) \)
(D) \( (0, \infty) \)
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