十字相乘法十题:
2X²+3x+1; 6X²-5x-6; X²+5x+6; 6X²-14x+8; X²-x-6; 5X²+9x-2; 7X²+2x-5; 4X²+x-14; 3X²-5x-2;
9X²+10x-16.
分组分解法十题:
X²-xy+6x-6y; 8X²-6x+12xy-9y; 2X²-5x+2xy-5y; X²-2x+2xy-14y; X²y+13y-7X²-91; X²-6x+5xy-30y;
20xy+12x-5y-3; 3X²-3x-2xy+2y; 8X²-20xy-15y-6x; 3X²+18x-42y-7xy.