85问答库 > 3x^2+5xy-2y^2+x+9y-4分解因式怎么分？详细步骤

3x^2+5xy-2y^2+x+9y-4分解因式怎么分？详细步骤

2025-04-06 15:34:22
推荐回答（3个）
回答1：

3x^2+5xy-2y^2+x+9y-4 =3x^2+(5y+1)x-(2y^2-9y+4) =3x^2+(5y+1)x-(y-4)(2y-1) =(3x-y+4)(x+2y-1) 十字交叉

回答2：

3x^2+5xy-2y^2+x+9y-4 =(x+2y)(3x-y)+x+9y-4 =(x+2y-1)(3x-y+4).

回答3：

3x -y 4 x 2y -1 双十字因式分解~~~ 得： 3x^2+5xy-2y^2+x+9y-4 =(3x-y+4)(x+2y-1)

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