1.

Rationalise the denominator of 1/√5-2

Answer»

\frac{1}{ \sqrt{5}  - 2}

\frac{1}{ \sqrt{5}  - 2}  \times  \frac{ \sqrt{5}  + 2}{ \sqrt{5} + 2 }

\frac{ \sqrt{5} + 2 }{5 - 4}

\frac{ \sqrt{5}  + 2}{1}



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