Question

(Rationalisation
1/4-√7=​

Answer 1

Step-by-step explanation:

$\frac{1}{4 - \sqrt{7} }$

$= \frac{1}{4 - \sqrt{7} } \times \frac{4 + \sqrt{7} }{4 + \sqrt{7} }$

$= \frac{4 + \sqrt{7} }{ ({4})^{2} - \sqrt{ ({7}^){2} } }$

$= \frac{4 + \sqrt{7} }{ 16 - 7 }$

$= \frac{4 + \sqrt{7} }{9}$

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Hope it helps.

Answer 2

Step-by-step explanation:

Hope it helps...........

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