Question

3 / 4 - root 7
Rationalise the denominator

Answer 1

Answer:

$= \frac{3}{4 - \sqrt{7} } \\ \\ = \frac{3 \times (4 - \sqrt{7}) }{(4 - \sqrt{7})(4 - \sqrt{7} ) } \\ \\ = \frac{12 - 3 \sqrt{7} }{(4) {}^{2} - ( \sqrt{7}) {}^{2} } \\ \\ = \frac{12 - 3 \sqrt{7} }{16 - 7} \\ \\ = \frac{12 - 3 \sqrt{7} }{9} \\ \\ = \frac{3(4 - \sqrt{7} )}{9} \\ \\ = \frac{4 - \sqrt{7} }{3}$

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

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