Yes. In general, real numbers include negative numbers; they also include numbers that have decimals.
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The product of nine negative real numbers is a negative real number.
You cannot get real square root of a negative number because two numbers multiplied by themselves are always positive You can always get a real cube root of a negative number because three negative numbers multiplied by themselves give a negative .
Zero is a real number, it is neither positive or negative, and it is even.
The square of a real number is always positive no matter which real number you start with. Therefore, a negative number squared is positive. For example: 2 * 2 = 4, -2 * -2 = 4.
Imaginary number