Evaluate
42
Factor
2\times 3\times 7
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2\sqrt{7}\sqrt{63}
Factor 28=2^{2}\times 7. Rewrite the square root of the product \sqrt{2^{2}\times 7} as the product of square roots \sqrt{2^{2}}\sqrt{7}. Take the square root of 2^{2}.
2\sqrt{7}\times 3\sqrt{7}
Factor 63=3^{2}\times 7. Rewrite the square root of the product \sqrt{3^{2}\times 7} as the product of square roots \sqrt{3^{2}}\sqrt{7}. Take the square root of 3^{2}.
6\sqrt{7}\sqrt{7}
Multiply 2 and 3 to get 6.
6\times 7
Multiply \sqrt{7} and \sqrt{7} to get 7.
42
Multiply 6 and 7 to get 42.
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