Question

Rationalise the denominator _5/3√7

Answer 1

Answer:

(5√7)/21

Step-by-step Explanation:

$\frac{5}{3 \sqrt{7} } \\ = \frac{5}{3 \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} } \\ = \frac{5 \sqrt{7} }{3 \sqrt{7 \times 7} } \\ = \frac{5 \sqrt{7} }{3 \times 7} \\ = \frac{5 \sqrt{7} }{21}$

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Answer 2

5/3√7 = 5/3√7 × √7/√7

= (5×√7)/3(√7)^2

= 5√7/21