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It's the same as adding a positive number.
The sign of the answer will always be a positive number because subtracting a negative is the same as adding a positive (
Every positive rational number and its negative are the two square roots of the same positive rational number.
The absolute value of a negative number is positive.
The absolute value of a number is the distance it is away from zero or in other words, the number will become positive, but if it is already positive, will remain the same.