Question

Rationalise the denominator of 1/V7-2​

Answer 1

Answer:

$\frac{\sqrt{7}+2 }{3}$

Step-by-step explanation:

$\frac{1}{\sqrt{7}-2 } \\\frac{1}{\sqrt{7}-2 } *\frac{\sqrt{7}+2 }{\sqrt{\s7}+2 } \\\frac{\sqrt{7}+2 }{(\sqrt{7}-2)(\sqrt{7}+2) } \\\frac{\sqrt{7}+2 }{(\sqrt{7}) ^{2}-\ (2 )^{2} } \\\frac{\sqrt{7}+2 }{7-4} \\\frac{\sqrt{7}+2 }{3}$

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