AM-348

Surds and rationalising

A Math · Secondary 3 · Medium · Surds and rationalising

Given that

f(x) = \dfrac{3+2\sqrt{7}}{5-\sqrt{7}}

, rationalise the denominator and simplify

f(x)

.

$\dfrac{29+13\sqrt{7}}{18}$
$\dfrac{29-13\sqrt{7}}{18}$
$\dfrac{29+13\sqrt{7}}{25}$
$\dfrac{15+14\sqrt{7}}{18}$

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