If (the second power of a-3a-1) + a = the second power of A-A + 4, then a=______
(a²-3a-1)+A=a²-a+4
A=(a²-a+4)-(a²-3a-1)
=a²-a+4-a²+3a+1
=(a²-a²)+(-a+3a)+(4+1)
=2a+5
Then a = 2A + 5
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