Reduce the expression by rationalising it — task. Mathematics State Board, Class 9.

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(\sqrt{43} + \sqrt{17}) (\sqrt{43} - \sqrt{17})

$=$

{(\sqrt{43} - \sqrt{17})}^{2}

$=$

i

$2$

\sqrt{i}

\frac{5}{16 + \sqrt{7}}

Did you find an error?

15. Reduce the expression by rationalising it