Evaluate
12\sqrt{7}\approx 31.749015733
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3\sqrt{7}+3\sqrt{7\times 9}
Combine \sqrt{7} and 2\sqrt{7} to get 3\sqrt{7}.
3\sqrt{7}+3\sqrt{63}
Multiply 7 and 9 to get 63.
3\sqrt{7}+3\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}.
3\sqrt{7}+9\sqrt{7}
Multiply 3 and 3 to get 9.
12\sqrt{7}
Combine 3\sqrt{7} and 9\sqrt{7} to get 12\sqrt{7}.
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Limits
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