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to find the difference between a negative number and a positive number, you do the same thing as you would do for a positive and positive number. You just subtract the smaller number (which would of course be the negative) from the larger number (the positive). example: difference between 7 and -4 7 - (-4) = 11
This is not possible, because any number squared would be positive, not negative.
For example, if you have [ -4 1 0 3] as your matrix, it would be negative 4. Whatever negative number is in your matrix is your answer.
There is no need to find the square root of a negative number for sqrt(0.6)!
The cube of a negative number is negative. Negative times negative is positive, but then you have the third multiplication, and positive times negative is negative. So for example (-2)3 = -8.