初一因式分解题。30道。 因式分解题目及过程30道
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2,X^-27X+26 =(x-26)(x-1)
3,X^-12X+20 =(x-10)(x-2)
4,X^+19X-20 =(x+20)(x-1)
5,X^-21X+20 =(x-20)(x-1)
6,X^-19X-20 =(x-20)(x+1)
7,X^+14X+33 =(x+3)(x+11)
8,X^+16X+48 =(x+4)(x+12)
9,X^-13X-48 =(x-16)(x+3)
10,X^-8X-48 =(x-12)(x+4)
11,X^-49X+48 =(x-48)(x-1)
12,X^+14X+48 =(x+6)(x+8)
13,X^+34X+33 =(x+33)(x+1)
14,X^+29X+100 =(x+25)(x+4)
15,X^-34X+33 =(x-33)(x-1)
16,X^-32X-33 =(x-33)(x+1)
17,X^+3X+2 =(x+2)(x+1)
18,X^+11X+28 =(x+4)(x+7)
19,X^+19X+18 =(x+18)(x+1)
20,X^-11X-26 =(x-13)(x+2)
21,X^+X-20 =(x+5)(x-4)
22,X^-6X-7 =(x-7)(x+1)
23,X^+6X-7 =(x+7)(x-1)
24,X^-12X+11 =(x-11)(x-1)
25,X^+9X+18 =(x+3)(x+6)
26,X^-19X+18 =(x-18)(x-1)
27,X^+7X-18 =(x+9)(x-2)
28,X^+19X+18 =(x+18)(x+1)
29,X^+27X+26 =(x+26)(x+1)
30,X^+12X+20 =(x+2)(x+10)
你这么懒惰啊...全部用十字相乘法啊和求根公式.给你举几个例子算了...大同小异
1.(x-2)(x-13)
2.(x-1)(x-26)
3.(x-2)(x-10)
4.(x+20)(x-1)
5.(x-20)(x-1)
...
绛旓細鎵浠^2+y^2=a1=3 10.鑻ヤ簩娆′笁椤瑰紡x^2+ax-1鍙鍒嗚В鎴愶紙x-2)(x+b)姹(a+b)鐨勫 (x-2)(x+b)=x^2-2x+bx-2b =x^2+(b-2)^2-2b =x^2+ax-1 瀵瑰簲椤圭郴鏁扮浉绛 鎵浠-2=a,-2b=-1 b=1/2,a=b-2=-3/2 鎵浠+b=-1 ...
绛旓細29,X^+27X+26 =(x+26)(x+1)30,X^+12X+20 =(x+2)(x+10)
绛旓細1銆佸崟椤瑰紡12ab³涓-18a³b²鐨勫叕鍥犲紡鏄6ab²(2b²-3a²)2銆鍥犲紡鍒嗚В:36-x²=(6-x)(6+x).3銆佸洜寮忓垎瑙:4y²-4y+1=(2y-1)².4銆佸洜寮忓垎瑙:a(b-c)+b(b-c)=(a+b)(b-c).5銆佸洜寮忓垎瑙:4鍒嗕箣1x²-25y²=(1/2x+5y...
绛旓細1,x^-x-20 =(x-5)(x+4)2,x^-9x+20 =(x-5)(x-4)3,x^-9x-20 =(x-3+鏍瑰彿14锛夛紙x-3-鏍瑰彿14)4,x^+9x+20 =(x+5)(x+4)5,x^-18x+32 =(x-2)(x-16)6,x^+14x-31 7,x^+18x+32 8,x^+14x-32 9,x^+19x+48 10,x^+47x-48 11,x^+13x-48 12,x^+2x...
绛旓細42.鍥犲紡鍒嗚В9x2锛66x锛121锛(3x-11)^2 43.鍥犲紡鍒嗚В8锛2x2锛2(2+x)(2-x)44.鍥犲紡鍒嗚Вx(x锛2)锛峹锛漻(x+1)45.鍥犲紡鍒嗚В9x2锛30x锛25锛(3x-5)^2 46.鍥犲紡鍒嗚В锛20x2锛9x锛20锛(-4x+5)(5x+4)47.鍥犲紡鍒嗚В12x2锛29x锛15锛(4x-3)(3x-5)48.鍥犲紡鍒嗚В36x2锛39x锛9锛3(3x+1...
绛旓細=(2a+b)(-6a-3b)=-3(2a+b)(2a+b)=-3(2a+b)^2 2.16(x-y)^2-9(x+y)^2 =[4(x-y)-3(x+y)][4(x-y)+3(x+y)]=(x-7y)(7x-y)3.x^4-x^3-x+1 =x^3(x-1)-(x-1)=(x-1)(x^3-1)=(x-1)(x-1)(x^2+x+1)=(x-1)^2(x^2+x+1)4.4x^4-1 ...
绛旓細锛1锛 锛坅+b锛²+6锛坅+b锛+9=[(a+b)+3]²=(a+b+3)²锛2锛 16 -24锛坸-y锛+9锛坸-y锛²=[4-3(x-y)]²=(4-3x+3y)²
绛旓細25.x2锛峹锛14 锛濇暣鏁板唴鏃犳硶鍒嗚В 26.9x2锛30x锛25锛(3x-5)^2 27.锛20x2锛9x锛20锛(-4x+5)(5x+4)28.12x2锛29x锛15锛(4x-3)(3x-5)29.36x2锛39x锛9锛3(3x+1)(4x+3)30.21x2锛31x锛22锛(21x+11)(x-2)31.9x4锛35x2锛4锛(9x^2+1)(x+2)(x-2)32.(2x锛1)(x...
绛旓細5銆4鍒嗕箣1(x-5y)(x+5y)6銆(x+y-z)(x+y+z)7銆-(a-b)²8銆11 9銆(xy-1)²10銆3x³y-6x²y²+3xy³=3xy(x²-2xy+y²)=3xy(x-y)²11銆亁鐨勪簲娆℃柟y鐨勫洓娆℃柟+x鐨勫洓娆℃柟y鐨勪簲娆℃柟=x³y³(x+y)=(xy)³...
绛旓細4銆(ab+cd)^2+(ad-bc)^2=36 锛坅²+c²)(b²+d²锛=36 鍥犱负a²銆乧²銆乥²銆乨²閮芥槸鏁存暟 鎵浠²+c²鍜宐²+d²閮芥槸鏁存暟锛屾墍浠ユ湁 1锛塧²+c²+b²+d²=0+1+6+6=13 2锛塧²+c²+...
