A negative irrational number can be thought of as an irrational number multiplied by -1, or an irrational number with a minus sign in front of it.
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Not necessarily. Irrational numbers can be negative or positive.
No. The number pi is irrational, and if you multiply an irrational number by a non-zero rational number (in this case, -2), you will get another irrational number.As a general guideline, most calculations that involve irrational numbers will again give you an irrational number.
It is neither, it is an imaginary number.
No. An irrational number is any number that is not a rational number; A rational number is any number that can be expressed as one integer over another integer. negative 3 over 4 is one integer (negative 3) over another integer (4), and so is a rational number.
Any type of fraction is always a rational number.