麻烦哪位亲出一套一元二次因式分解的题目.难度中等,30题左右,要用到那种“十字交叉相乘”的数学思想的题.thanks!
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麻烦哪位亲出一套一元二次因式分解的题目.难度中等,30题左右,要用到那种“十字交叉相乘”的数学思想的题.thanks!
麻烦哪位亲出一套一元二次因式分解的题目.
难度中等,30题左右,要用到那种“十字交叉相乘”的数学思想的题.thanks!
麻烦哪位亲出一套一元二次因式分解的题目.难度中等,30题左右,要用到那种“十字交叉相乘”的数学思想的题.thanks!
1.x2-25=
2.x2-20x+100=
3.x2+4x+3=
4.4x2-12x+5=
5.3ax2-6ax=
6.x(x+2)-x=
7.x2-4x-ax+4a=
8.25x2-49=
9.36x2-60x+25=
10.4x2+12x+9=
11.x2-9x+18=
12.2x2-5x-3=
13.12x2-50x+8=
14.(x+2)(x-3)+(x+2)(x+4)=
15.2ax2-3x+2ax-3=
16.9x2-66x+121=
17.8-2x2=
18.x2-x+14 =
19.9x2-30x+25=
20.-20x2+9x+20=
21.12x2-29x+15=
22.36x2+39x+9=
23.21x2-31x-22=
24.9x4-35x2-4=
25.(2x+1)(x+1)+(2x+1)(x-3)=
26.2ax2-3x+2ax-3=
27.x(y+2)-x-y-1=
28.(x2-3x)+(x-3)2=
29.9x2-66x+121=
30.8-2x2=
31.x4-1=
32.x2+4x-xy-2y+4=
33.4x2-12x+5=
34.21x2-31x-22=
35.4x2+4xy+y2-4x-2y-3=
36.9x5-35x3-4x=
37.3x2-6x=
38.49x2-25=
39.6x2-13x+5=
40.x2+2-3x=
41.12x2-23x-24=
42.(x+6)(x-6)-(x-6)=
43.3(x+2)(x-5)-(x+2)(x-3)=
44.9x2+42x+49=
45.(x+2)-2(x+2)2=
46.36x2+39x+9=
47.2x2+ax-6x-3a=
48.22x2-31x-21=
49.3ax2-6ax=
50.(x+1)x-5x=
51.(2x+1)(x-3)-(2x+1)(x-5)=
52.xy+2x-5y-10=
53.x2y2-x2-y2-6xy+4=
54.8x2-18
55.x2-(a-b)x-ab
56.9x4+35x2-4
57.x2-y2-2yz-z2
58.a(b2-c2)-c(a2-b2)
59.(2x+1)(x+1)+(2x+1)(x-3)
60.39x2-38x+8
61 7(x-1)2+4(x-1)(y+2)-20(y+2)2
62.xy2-2xy-3x-y2-2y-1
63.4x2-6ax+18a2
64.20a3bc-9a2b2c-20ab3c
65.2ax2-5x+2ax-5
66.4x3+4x2-25x-25
67.(1-xy)2-(y-x)2
68.mx2-m2-x+1
69.a2-2ab+b2-1
70.5x2-45
71.81x3-9x
72.x2-y2-5x-5y
73.x2-y2+2yz-z2
74.xy2-2xy-3x-y2-2y-1
75.y2(x-y)+z2(y-x)