UC知道[高分]几道题!!!!!!!!
来源：百度知道 编辑：UC知道 时间：2024/06/12 08:22:33
十字相乘法
2X^2-5X+3
6X^2+7X-3
5X^2-7X+2
14X^2Y^2-17XY-6
知道十字相乘吗?例:3X^2-2X-1=(3X+1)(X-1)
6X^2-11XY+3Y^2=(3X-Y)(2X-3Y)
2X^2-5X+3
6X^2+7X-3
5X^2-7X+2
14X^2Y^2-17XY-6
知道十字相乘吗?例:3X^2-2X-1=(3X+1)(X-1)
6X^2-11XY+3Y^2=(3X-Y)(2X-3Y)
2X^2-5X+3=(x-1)(2x-3)
6X^2+7X-3=(2x+3)(3x-1)
5X^2-7X+2=(x-1)(5x-2)
14X^2Y^2-17XY-6=14(xy)^2-17xy-6=(2xy-3)(7xy+2)
刚刚马虎了，修改了，太郁闷了！
2X^2-5X+3 =(2x-3)(x-1)
6X^2+7X-3 =(3x-2)(x+30
5X^2-7X+2 =(5x-2)(x-1)
14X^2Y^2-17XY-6 =(2xy-3)(7xy+2)
2X^2-5X+3=(x-1)(2x-3)
6X^2+7X-3=(2x+3)(3x-1)
5X^2-7X+2=(x-1)(5x-2)
14X^2Y^2-17XY-6=(2xy-3)(7xy+2)
LSS的错了
2X^2-5X+3=(x-1)(2x-3)
6X^2+7X-3=(3x-1)(2x+3)
5X^2-7X+2=(x-1)(5x-2)
14X^2Y^2-17XY-6=??
2x^2-5x+3=(2x-3)(x-1);
6x^2+7x-3=(3x-1)(2x+3);
5x^2-7x+2=(5x-2)(x-1);
14x^2y^2-17xy-6=(7xy+2)(2xy-3)
答案就是这个了！