Evaluate
72\sqrt{2}\approx 101.823376491
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2\sqrt{2}+10\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}.
2\sqrt{2}+70\sqrt{2}
Multiply 10 and 7 to get 70.
72\sqrt{2}
Combine 2\sqrt{2} and 70\sqrt{2} to get 72\sqrt{2}.
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