Radical Sign
Actually a negative number can be under a square root symbol. This becomes very useful in electrical calculations. The square root of -1 is j. That is, j2 = -1.
Just under 5.41
radicand
The radicand.
No. Negative numbers are real but their square roots are not.
No. For example, the square root of two plus (minus the square root of two) = 0, which is not an irrational number.
Real numbers are closed under addition and subtraction. To get a number outside the real number system you would have to use square root.
Radical Sign
81 is the square root and 9.5 is under root.
The square root OF 16? It's 4.
2 = 2/1 is rational. Sqrt(2) is not rational.
Because rational numbers are not closed under fractional exponents. For example, the square root of 2 is not a rational number. Nor is a cube root of 2, or a square root of 5, etc. And in case you are wondering about the relevance of the square root of 2, it is the length of the diagonal of a unit square - and so it is the longest length that can fit inside a 1x1 square.
The only thing that a square root symbol does is that it symbolises an operation (taking the square root) of whatever is under the sign.
10 times square root of 2 The square root of 200 is sq. root of 100 times 2, then the sq. root of 100 is 10 and remains the sq. root of 2. check the answer: square root of 2 is 1.41, 10 times 1.41 is 14.1 196 is closed enough to 200 and the square root of 196 is 14.
Actually a negative number can be under a square root symbol. This becomes very useful in electrical calculations. The square root of -1 is j. That is, j2 = -1.
simply see what you can multiply twice to get the number under the square root sign.