Rationalise the denominator 4/√7-√5

1.	Rationalise the denominator 4/√7-√5
Answer» <html><body><p><strong><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a>:</strong></p><p></p><p>D</p><p>7</p><p> </p><p> − </p><p>3</p><p> </p><p> </p><p>7</p><p> </p><p> + </p><p>3</p><p> </p><p> </p><p>4</p><p> </p><p> </p><p>The <a href="https://interviewquestions.tuteehub.com/tag/conjugate-929330" style="font-weight:bold;" target="_blank" title="Click to know more about CONJUGATE">CONJUGATE</a> of </p><p>7</p><p> </p><p> + </p><p>3</p><p> </p><p> is </p><p>7</p><p> </p><p> − </p><p>3</p><p> </p><p> </p><p>= </p><p>7</p><p> </p><p> + </p><p>3</p><p> </p><p> </p><p>4</p><p> </p><p> × </p><p>7</p><p> </p><p> − </p><p>3</p><p> </p><p> </p><p>7</p><p> </p><p> − </p><p>3</p><p> </p><p> </p><p> </p><p> </p><p>= </p><p>7−3</p><p>4( </p><p>7</p><p> </p><p> − </p><p>3</p><p> </p><p> )</p><p> </p><p> </p><p>= </p><p>7</p><p> </p><p> − </p><p>3</p><p></p></body></html>

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