Question

rationlise the denominator
please do ..fast
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Answer 1

Answer:

2(3+√7)

here's your answer

Answer 2

$\frac{4}{3 - \sqrt{7} } \times \frac{3 + \sqrt{7} }{3 + \sqrt{7} } \\ = \frac{12 + 4 \sqrt{7} }{9 - 7} \\ = \frac{16 \sqrt{7} }{2} \\ = 8 \sqrt{7}$