Evaluate
28\sqrt{2}\approx 39.597979746
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4\times 7\sqrt{2}
Factor 98=7^{2}\times 2. Rewrite the square root of the product \sqrt{7^{2}\times 2} as the product of square roots \sqrt{7^{2}}\sqrt{2}. Take the square root of 7^{2}.
28\sqrt{2}
Multiply 4 and 7 to get 28.
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