因式分解：十字交叉相乘法：补充练习一

1、袅芅薁蚅羇蒁蒇蚄肀芄蒃蚃节肆螁蚃羁莂蚇蚂肄膅薃蚁膆莀葿蚀袆膃莅蝿羈莈蚄螈肀膁薀螇芃莇薆螇羂芀蒂螆肅蒅莈螅膇芈蚇螄袇蒃薃螃罿芆蒈袂肁蒂莄袁膄芄蚃袁袃肇虿袀肆莃薅衿膈膆蒁袈袇莁莇袇羀膄蚆袆肂荿薂羅膄膂蒈羅袄莈莄羄羆膀螂羃腿蒆蚈羂芁艿薄羁羁蒄蒀薈肃芇莆薇膅蒂蚅蚆袅芅薁蚅羇蒁蒇蚄肀芄蒃蚃节肆螁蚃羁莂蚇蚂肄膅薃蚁膆莀葿蚀袆膃莅蝿羈莈蚄螈肀膁薀螇芃莇薆螇羂芀蒂螆肅蒅莈螅膇芈蚇螄袇蒃薃螃罿芆蒈袂肁蒂莄袁膄芄蚃袁袃肇虿袀肆莃薅衿膈膆蒁袈袇莁莇袇羀膄蚆袆肂荿薂羅膄膂蒈羅袄莈莄羄羆膀螂羃腿蒆蚈羂芁艿薄羁羁蒄蒀薈肃芇莆薇膅蒂蚅蚆袅芅薁蚅羇蒁蒇蚄肀芄蒃蚃节肆螁蚃羁莂蚇蚂肄膅薃蚁膆莀葿蚀袆膃莅蝿羈莈蚄螈肀膁薀螇芃莇薆螇

2、羂芀蒂螆肅蒅莈螅膇芈蚇螄袇蒃薃螃罿芆蒈袂肁蒂莄袁膄芄蚃袁袃肇虿袀肆莃薅衿膈膆蒁袈袇莁莇袇羀膄蚆袆肂荿薂羅膄膂蒈羅袄莈莄羄羆膀螂羃腿蒆蚈羂芁艿薄羁羁蒄蒀薈肃芇莆薇膅蒂蚅蚆袅芅薁蚅羇蒁蒇蚄肀芄蒃蚃节肆螁蚃羁莂蚇蚂肄膅薃蚁膆莀葿蚀袆膃莅蝿羈莈蚄螈肀膁薀螇芃莇薆螇羂芀蒂螆肅蒅莈螅膇芈蚇螄袇蒃薃螃罿芆蒈袂肁 因式分解：十字/交叉相乘法：補充練習一因式分解下列多項式1.x2 + 3x + 2 =2.x2 + 6x + 5 =3.x2 + 12x +11 =4.x2 + 18x + 17 =5.x2 + 20x + 19 =6.x2 + 24x + 23 =7.x2 + 30x + 29 =8.x2 + 3

3、2x + 31 =9.x2 + 38x + 37 =10.x2 + 42x + 41 =11.x2 + 44x + 43 =12.x2 + 48x + 47 =因式分解：十字/交叉相乘法：補充練習二因式分解下列多項式1a.x2 + 4x + 3 =1b.x2 - 4x + 3 =1c.x2 + 2x - 3 =1d.x2 - 2x - 3 =2a.x2 + 8x + 7 =2b.x2 + 6x - 7 =2c.x2 - 6x - 7 =2d.x2 - 8x + 7 =3a.x2 + 14x + 13 =3b.x2 - 12x - 13 =3c.x2 - 14x + 13 =3d.x2 + 12

4、x - 13 =因式分解：十字/交叉相乘法：補充練習三因式分解下列多項式1a.x2 + 7x + 6 =1b.x2 - 7x + 6 =1c.x2 + 5x - 6 =1d.x2 - 5x - 6 =1e.x2 + 5x + 6 =1f.x2 - 5x + 6 =1g.x2 + x - 6 =1h.x2 - x - 6 =2a.x2 + 16x + 15 =2b.x2 - 16x + 15 =2c.x2 + 14x - 15 =2d.x2 - 14x - 15 =2e.x2 + 2x - 15 =2f.x2 - 2x - 15 =2g.x2 + 8x + 15 =2h.x2 - 8x + 15

5、 =3a.x2 + 23x + 22 =3b.x2 - 23x + 22 =3c.x2 + 9x - 22 =3d.x2 - 9x - 22 =3e.x2 + 13x + 22 =3f.x2 - 13x + 22 =3g.x2 - 21x - 22 =3h.x2 + 21x - 22 =因式分解：十字/交叉相乘法：補充練習四因式分解下列多項式1.x2 + 2x + 1 =2.x2 - 2x + 1 =3.x2 - 4x +4 =4.x2 + 4x + 4 =5.x2 - 10x + 25 =6.x2 + 10x + 25 =7.x2 + 14x + 49 =8.x2 - 14x + 49 =9

6、.x2 + 22x + 121 =10.x2 - 22x + 121 =11.x2 - 26x + 169 =12.x2 + 26x + 169 =因式分解：十字/交叉相乘法：補充練習五因式分解下列多項式1a.x2 + 13x + 12 =1b.x2 - 13x + 12 =1c.x2 + 11x - 12 =1d.x2 - 11x - 12 =1e.x2 + 8x + 12 =1f.x2 - 8x + 12 =1g.x2 + 4x - 12 =1h.x2 - 4x - 12 =1i.x2 + 7x + 12 =1j.x2 - 7x + 12 =1k.x2 + x - 12 =1l.x2 -

7、x - 12 =2a.x2 + 11x + 18 =2b.x2 - 11x + 18 =2c.x2 + 7x - 18 =2d.x2 - 7x - 18 =2e.x2 + 19x + 18 =2f.x2 - 19x + 18 =2g.x2 + 17x - 18 =2h.x2 - 17x - 18 =2i.x2 + 9x + 18 =2j.x2 - 9x + 18 =2k.x2 + 3x - 18 =2l.x2 - 3x - 18 =3a.x2 + 12x + 20 =3b.x2 - 12x + 20 =3c.x2 + x - 20 =3d.x2 - x - 20 =3e.x2 + 9x + 2

8、0 =3f.x2 - 9x + 20 =3g.x2 + 8x - 20 =3h.x2 - 8x - 20 =3i.x2 + 21x + 20 =3j.x2 - 21x + 20 =3k.x2 + 19x - 20 =3l.x2 - 19x - 20 =因式分解：十字/交叉相乘法：補充練習六因式分解下列多項式1.2x2 + 3x + 1 =2.5x2 + 6x + 1 =3.11x2 + 12x +1 =4.17x2 + 18x + 1 =5.19x2 + 20x + 1 =6.23x2 + 24x + 1 =7.29x2 + 30x + 1 =8.31x2 + 32x + 1 =9.37x2

9、+ 38x + 1 =10.41x2 + 42x + 1 =11.43x2 + 44x + 1 =12.47x2 + 48x + 1 =因式分解：十字/交叉相乘法：補充練習七因式分解下列多項式1a.12x2 + 13x + 1 =1b.12x2 - 13x + 1 =1c.12x2 + 11x - 1 =1d.12x2 - 11x - 1 =1e.12x2 + 8x + 1 =1f.12x2 - 8x + 1 =1g.12x2 + 4x - 1 =1h.12x2 - 4x - 1 =1i.12x2 + 7x + 1 =1j.12x2 - 7x + 1 =1k.12x2 + x - 1 =1l.

10、12x2 - x - 1 =因式分解：十字/交叉相乘法：補充練習八因式分解下列多項式1a.2x2 + 13x + 15 =1b.2x2 - 13x + 15 =1c.2x2 + 7x - 15 =1d.2x2 - 7x - 15 =1e.2x2 + 11x + 15 =1f.2x2 - 13x + 15 =1g.2x2 + x - 15 =1h.2x2 - x - 15 = 蒀蒃袀节莃螁衿羁膆蚇袈肄莁薃袇膆膄葿袆袆荿莅羅羈膂蚄羅肀莈薀羄芃膀薆羃羂蒆蒂羂肅艿螁羁膇蒄蚇羀艿芇薃聿罿蒂蒈蚆肁芅莄蚅膄蒁蚃蚄袃芄虿蚃肆蕿薅蚃膈莂蒁蚂芀膅螀蚁羀莀蚆蚀肂膃薂蝿膄莈蒈螈袄膁莄螇肆莇螂螇腿芀蚈螆芁蒅薄螅羁芈蒀螄肃蒃莆螃膅芆蚅袂袅蒂薁袁羇芄蒇袁膀蒀蒃袀节莃螁衿羁膆蚇袈肄莁薃袇膆膄葿袆袆荿莅羅羈膂蚄羅肀莈薀羄芃膀薆羃羂蒆蒂羂肅艿螁羁膇蒄蚇羀艿芇薃聿罿蒂蒈蚆肁芅莄蚅膄蒁蚃蚄袃芄虿蚃肆蕿薅蚃膈莂蒁蚂芀膅螀蚁羀莀蚆蚀肂膃薂蝿膄莈蒈螈袄膁莄螇肆莇螂螇腿芀蚈螆芁蒅薄螅羁芈蒀螄肃蒃莆螃膅芆蚅袂袅蒂薁袁羇芄蒇袁膀蒀蒃袀节莃螁衿羁膆蚇袈肄莁薃袇膆膄葿袆袆荿莅羅羈膂蚄羅