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2\sqrt{2}+3\sqrt{32}
Factor 8=2^{2}\times 2. Rewrite the square root of the product \sqrt{2^{2}\times 2} as the product of square roots \sqrt{2^{2}}\sqrt{2}. Take the square root of 2^{2}.
2\sqrt{2}+3\times 4\sqrt{2}
Factor 32=4^{2}\times 2. Rewrite the square root of the product \sqrt{4^{2}\times 2} as the product of square roots \sqrt{4^{2}}\sqrt{2}. Take the square root of 4^{2}.
2\sqrt{2}+12\sqrt{2}
Multiply 3 and 4 to get 12.
14\sqrt{2}
Combine 2\sqrt{2} and 12\sqrt{2} to get 14\sqrt{2}.