Difficult
यदि $x = \frac{\sqrt{5} + \sqrt{2}}{\sqrt{5} - \sqrt{2}}$ और $y = \frac{\sqrt{5} - \sqrt{2}}{\sqrt{5} + \sqrt{2}}$ हो,तो $3x^2 + 4xy - 3y^2$ का मान ज्ञात कीजिए।
- A$\frac{1}{3}[56\sqrt{10} - 12]$
- B$\frac{1}{3}[56\sqrt{10} + 12]$
- C$\frac{1}{3}[56 + 12\sqrt{10}]$
- Dइनमें से कोई नहीं
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