No. A natural number is a whole number, that is, no digits after the decimal point. Calculate the square root of 12 on a calculator, and you will see that it is not a whole number.
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The square root of 12 is not a rational number. In fact, it is a radical number. It's simplified form would be 2 multiplied by the square root of 3.
The square root of an answer is a number times itself to get that number so the square root of 4 is 2 the square root of 144 is 12 because 12 times itself gives us the answer of 144
the square root of 144 is 12. the 'square root' means what number times itself equals an answer. (144) the answer is 12.
To simplify the square root of 12: Look at numbers that can be reduced from the larger number and can be square rooted itself. 4 * 3 = 12 The square root of 4 is 2. Therefore the simplification of the square root of 12 is: 2*square root of 3
The negative square root of -144 is -12i - that is -12 times the square root of minus 1, ie √-144 = 12√-1. The above is a complex number, which I suspect is not the answer you wanted; there is no real number that is the square root of a negative number If you wanted the negative square root of 144, then it is -12.