Question

tell the answer asap please​

Answer 1

Step-by-step explanation:

$\frac{1}{4 + \sqrt{15} } \times \frac{4 - \sqrt{15} }{4 - \sqrt{15} } \\ \frac{4 - \sqrt{15} }{{4}^{2} - { \sqrt{15} }^{2} } \\ \frac{4 - \sqrt{15} }{16 - 15} \\ 4 - \sqrt{15}$

Here's the answer

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