Find 5-72-5-Is it rational- -4 MARKS-

Concept : 1 Mark Calculation : 2 Marks Identification : 1 Mark (5+√(7))(2+√(5))= 5×2+5×√(5)+√(7)×2+√(7)×√(5) It is irrational ...

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Find 5+√72+√5...

Question

Find $(5 + \sqrt{7}) (2 + \sqrt{5})$ .Is it rational? [4 MARKS]

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72, \frac{5}{27}, \frac{62}{0}, 1 \frac{3}{5}, - 7 \frac{5}{4}, 0

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