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Yes, they are numbers in the complex field.

Look at it this way: You started to count with positive integers. But with only those numbers subtraction was limited. You could not take 3 from 2. The solution was to introduce negative numbers. That expanded the number system and what you could do with them.

You learned to divide, but you could not divide 2 by 3. This time the solution was to introduce [rational] fractions. Again, the number system was expanded as was the range of and its power.

You learned about square roots but even common numbers like 2 did not have a square root that was a rational number. So you introduced Irrational Numbers. Once again, the number system was expanded as was the range of and its power.

The next hurdle was the square root of negative numbers. The solution was to introduce complex numbers. And once again ... you guessed!

The introduction of each additional set of number comes as you get into more complicated areas of the subject. In the UK you will not come across complex numbers until you study further mathematics at A level.

The square roots of -9, for example, are ±3iwhere i denotes the square root of -1.

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Q: Does a negative number have any square roots?
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Related questions

Is the square root a real number?

The square roots of any positive real number are a positive and a negative real number. The square roots of any negative real number are a positive and a negative imaginary number. The square roots of any imaginary number or any complex number are two complex numbers.


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Any negative number, and infinity. However, a number (called "i") was created to represent the square roots of negative numbers.


What does a non-zero rational number mean?

any number (including fractions, square roots and Pi) that are not 0 and are not square roots of negative numbers.


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Any positive integer has two square roots, one positive number and one negative number. This is because a negative number multiplied by a negative number is equal to a positive number.In this instance, the square roots of 36 are 6, and -6.


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What can be determined from roots of real numbers?

The short answer is "Nothing". In the complex domain, the number of nth roots of any real number is n. Every non-negative real number has 2 square roots. Every real number has 3 cube roots. Every non-negative real number has 2 real square roots and 2 imaginary ones. and so on. So what?


How many square roots can a positive number have?

Every positive number has two square roots, though the roots are not always whole numbers (or even rational numbers). The more obvious of each numbers roots is the positive one.The positive square root of 4 is 2, because 2*2=4.The positive square root of 5 is roughly 2.236068.The other square root of a number is the negative inverse of their positive root. This is because when two negative numbers are multiplied together the negative signs "cancel out", leaving a positive number.The negative square root of 4 is -2, because -2*-2=4.The negative square root of 5 is roughly -2.236068.Zero has only one square root, itself, and no negative number has any (real number) square roots, since no number multiplied by itself will result in a negative.


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