计算:(2x+3y-1)(2x-3y+1)+(2x-3y+1)^2
1个回答
(2x+3y-1)(2x-3y+1)+(2x-3y+1)²
=(2x-3y+1)(2x+3y-1+2x-3y+1)
=(2x-3y+1)×4x
=8x²-12xy+4x
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