求50道初二下册数学因式分解化简求值题!各位帮帮啦~ 急啊!!! 还要求值啊!!
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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=54.8x2-1855.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