1.

Rationalise the denominated 3 root5 +5 root2/root 45+ root 50

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Answer:

1

Step-by-step EXPLANATION:

=3\sqrt{5}+5\sqrt{2} /(\sqrt{45} +\sqrt{50})    \\=3\sqrt{5}+5\sqrt{2} /(\sqrt{5*3*3}+\sqrt{2*5*5}  )\\=3\sqrt{5}+5\sqrt{2} /(3\sqrt{5}+5\sqrt{2} )\\=1



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