Question

please solve this sum
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Answer 1

Answer:

squaring on both sides

so,

${ \sqrt{13 - a \sqrt{10} )} }^{2} = {( \sqrt{8} + \sqrt{5} ) }^{2} \\ 13 - a \sqrt{10} = 8 + 5 + 2 \sqrt{40} \\ 13 - a \sqrt{10} = 13 + 2 \times 2 \sqrt{10} \\ </em></strong><strong><em>-</em></strong><strong><em>-</em></strong><strong><em>a \sqrt{10} = 4 \sqrt{10} \\ then \\ a = </em></strong><strong><em>-</em></strong><strong><em>4$

hope you understand

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