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No number. It is impossible.

-2*-2=4

* * * * *

True, if constrained to the Real numbers. If complex numbers are allowed, then the answer is 2i where i is the imaginary square root of -1.

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Q: What number multiplied by itself equals -4?
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What number multiplied by itself 4 times equals 256?

It is 4.


What number multiplied 4 times by itself equals to 81?

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the number of times a certain number is to be multiplied by itself: 2 to the power of 4 equals 16.


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Well, darling, if you want to get technical, the number that when multiplied by itself equals 16 is 4. So, go ahead and pat yourself on the back for cracking this mathematical conundrum. Now go forth and conquer the world with your newfound knowledge!


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A square root of a number is a number that, multiplied by itself once, will equal the first number. Meanwhile a cube root of a number is a number that, multiplied by itself twice, will equal the first number. For example: the square root of 4 is 2. [ 2 X 2 = 4 ] [ 2 times itself equals 4 ] : the cube root of 8 is 2. [ 2 X 2 X 2 = 8 ] [ 2 times itself, and then times itself again, equals 4 ]


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