Question

5 root 7 multiple by 2 root 7 how this slove?​

Answer 1

5√7×2√7

5×2×√7×7

10×7

70

here is your answer

Answer 2

$5 \sqrt{7} \times 2 \sqrt{7} \\ = 5 \times 2 \times \sqrt{7} \times \sqrt{7} \\ = 10 \times ({ \sqrt{7} })^{2} \\ = 10 \times 7 \\ = 70$

Hope this helps