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十字相乘分组分解因式练习题

发布时间:2014-06-05 08:12:56  

x2?3x?2 x2?3x?2 x2?2x?3 x2?2x?3

x2?5x?6 x2?5x?6 x2?5x?6 x2?5x?6

x?x?2 x?4x?12 x?2x?63 x?8x?15

x?12x?32 x?10x?9 x?3x?10 x?2x?15

22222222

2x2?5x?2 2x2?5x?3 2x2?3x?20 2x2?5x?7

2x2?7x?3 2x2?7x?3 2x2?7x?6 2x2?7x?6

3x2?7x?6 3x2?8x?3 3x2?5x?2 5x2?3x?2

5x2?6x?8 6x2?5x?25 6x2?7x?3

x2?x?a2?a x3?4x2?21x 3x3?10x2?3x x4?6x2?27

??

x4?10x2?9 (2x?3)2?3(2x?3)?2 (x2?8x)2?22(x2?8x)?120

4224(1)x?7x?6; (2)x?5x?36; (3)4x?65xy?16y; (4)a?7ab?8b; 42426336

(5)6a?5a?4a; (6)4a?37ab?9ab.

43264224

2x?2m?ax?am ⑵x2?xy?a2x?a2y ⑶7m2?3n?mn?21m

⑷0.3ax?0.6ay?x?2y ⑸10mx?12nx?5my?6ny ⑹a3x2?a3y?x2?y

⑺ax2?bx2?cx2?ay2?by2?cy2 ⑻2ax?2ay?3bx?4cy?3by?4cx

⑴a?b?2a?2b ⑵25a?x?2a?1 ⑶x5y2?x3?3xy?3

222222⑸a?6ab?9b?16xy ⑹3m?3?7my?7y ⑺13m?13m?m?1 423342

⑻ab?cb?16a?16c ⑴?x?y??x?y ⑵m2?m?1??n2?m?1? 32323333

222⑶a?a?1??2a?a?1??a?1 ⑷a?4ab?4b?x?2x?1 ⑹1?a1?b?4ab 222????

⑺a?8ab?16b?6a?24b?9 ⑻?x?2y??3x?7y??4?x?2y??x?y? 2222

22222⑴ax?ay?2axy?ab ⑵x?6xy?9y?4x?12y ⑹a?ab?b 4224

⑺20xy?y?x?20y?xy?y ⑻x2?y2?a2

⑶abx?y

⑻?m?2n??2m2?8n2?8mn?1 ⑶a?b?c?d?2?ad?bc? 42222223??222?4x2y2 ⑵m2?m?n??n2?n?m? ?22??xy?a23112?b2 ⑷4m2n2?m2?n2?x2 ⑸m4?2m2?m2?m? 2216???

⑸a?b?c?4d?2ab?4cd ⑺36mx?36my?3m2?y?x? 22222

3322 已知a?b?0,求a?2b?ab?2ab的值

222 证明:若a?b?c?ab?ac?bc?0,则a?b?c

把多项式a?b?c?2ab?2bc?2ac分解因式。

已知3b?a?2c,求代数式a?9b?4c?4ac的值 222444222222

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