若A-(X-3)=4x²-3X,则A=

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若A-(X-3)=4x²-3X,则A=若A-(X-3)=4x²-3X,则A=若A-(X-3)=4x²-3X,则A=A-(X-3)=4x²-3XA=4x²

若A-(X-3)=4x²-3X,则A=
若A-(X-3)=4x²-3X,则A=

若A-(X-3)=4x²-3X,则A=
A-(X-3)=4x²-3X
A=4x²-3X+X-3
=4x²-2X-3

同问若A-(X-3)=4x²-3X,则A=4x²-2x-3