Question

Rationalise the denominator of 1/7+3 root 2

Answer 1

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Q:-Rationalise the denominator of 1/7+3 root 2

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$⇛ \frac{1}{7 + 3 \sqrt{2} }$

$⇛ \frac{1}{7 + 3 \sqrt{2} } \times \frac{7 - 3 \sqrt{2} }{7 - 3 \sqrt{2} }$

$⇛ \frac{7 - 3 \sqrt{2} }{ {(7)}^{2} - {(3 \sqrt{2} )}^{2} }$

$⇛ \frac{7 - 3 \sqrt{2} }{49 - 18}$

$⇛ \frac{7 - 3 \sqrt{2} }{31} ✓$

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Answer 2

Answer:

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