十字相乘法节下列题xy-2x-3y+64x²+4xy+y²-4x-2y-3
3个回答
x -3
y -2
(x-3)(y-2)
(2x+y)²-2(2x+y)-3
2x+y -3
2x+y 1
(2x+y-3)(2x+y+1)
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