Question

simplify the expression
(5+√7)(2+√5)=​

Answer 1

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$(5 + \sqrt{7} )(2 + \sqrt{5} ) \\ = 5 \times 2 + 5 \times \sqrt{5} + \sqrt{7} \times 2 + \sqrt{7} \times \sqrt{5} \\ = 10 + 5 \sqrt{5} + 2 \sqrt{7} + \sqrt{35}$