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0\times 25\sqrt{10}
Factor 6250=25^{2}\times 10. Rewrite the square root of the product \sqrt{25^{2}\times 10} as the product of square roots \sqrt{25^{2}}\sqrt{10}. Take the square root of 25^{2}.
0\sqrt{10}
Multiply 0 and 25 to get 0.
0
Anything times zero gives zero.
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