It is negative. Any number squared (negative or positive) is positive (e.g -1x-1=+1=1x1) stick a negative sign in front of it and it becomes negative.
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-A*-A=A^2, POSITIVE.
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The way you wrote it, NEGATIVE
Don't confuse this with (-a) squared which is positive.
Don't confuse this with (-a) squared which is positive.