You can't write that as an exact fraction. In general, the square root of a natural number is either a natural number, or an irrational number - i.e., one that can't be written as a fraction. Of course, you can approximate it; for example (as a mixed fraction) as 3 74/100, or as 3 3/4.
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The square root of 400 is 20, as 20 multiplied by 20 equals 400. The square root of 196 is 14, as 14 multiplied by 14 equals 196. Therefore, the expression simplifies to 20 - 14, which equals 6.
23.452078799117147772828150567722The square root of the number 550 is a continued fraction, 23.45207879911714777282815056772233140294114176705868576802850.
Yes.
2 square root of 14
The square root of -3 is an imaginary number and the square root of 3 is an irrational number that can't be expressed as a fraction