Question

rationalise the denominator: 5/root 11 +4

Answer 1

Answer:

$\frac{5}{ \sqrt{11} + 4 }$

$\frac{5}{ \sqrt{11} + 4} \times \frac{ \sqrt{11} - 4 } { \sqrt{11} - 4 }$

$\frac{5 \times \sqrt{11 } - 4}{ \sqrt{11 {}^{2} } - 4 {}^{2} }$

$\frac{ - 4 + 5 \sqrt{11} }{11 - 16}$

$\frac{ - 4 + 5 \sqrt{11} }{5}$

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