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
P called as pseudo quadratic equations.

W
If the equation has only two real roots, then set of values of \( \lambda \) is
(A) \( (-\infty,-6) \)
(B) \( (-6,6) \)
(C) \( \{6\} \)
(D) \( \phi \)
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