Question

Simplyfy = 5 under root 7 × 2 under root 7​

Answer 1

$5\sqrt{7}.2\sqrt{7} = (5.2)(\sqrt{7}.\sqrt{7} )\\ =(10).(7)\\ =70$

Answer 2

$= 5 \sqrt{7} \times 2 \sqrt{7} \\ = 5 \times 2 \times 7 \\ = 70$

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