初一分解因式例题
答:1,X^-15X+26 =(x-13)(x-2)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 =...
答:1. (a - 8)^2 2. (2m + 1)^2 3.(3a - 4b)^2 4. -(m + 1/2)^2 5.(x^n - 1)^2
答:(1)6*x的平方+5xy-6*y的平方-6xz+4yz =(3x-2y)*(2x+3y)-2z*(3x-2y)=(3x-2y)*(2x+3y-2z)(2)x的平方-xy+2x+y-3 =(x^2+3x-4)-(xy+x)+(y+1)=(x-1)(x+4)-x(y+1)+(y+1)=(x-1)(x+4)-(y+1)(x-1)=(x-1)(x-y+3)...
答:一:书写上去的: 1、4x^2yz-12xy^2z+18xyz^2 2、(a-2b)^2-(3a-2b)^2 3、2x^5-32x 4、-16a^2+9(2a-b)^2 5、1/3mn^3-1/12m^3n6、12x-12x^2+3x^3 7、-36z^2+12xyz-x^2y^2 8、(a+b)^2(a-b)+(a+b)(a-b)^2 9、24ab^2c^2(a+b-c)-32...
答:(1)(x-1)的平方-2y(x-1)+y的平方 =[(x-1)-y]²=(x-1-y)²(2)24m的平方-2m的三次-72m =-2m(m²-12m+36)=-2m(m-6)²(3)(4m的平方+1)的平方-16m的平方 =(4m²+1+4m)(4m²+1-4m)=(2m+1)²(2m-1)²(4)9a的...
答:1、 5a²-4a-5b²+4b =5a²-5b²-4a+4b =5(a²-b²)-4(a-b)=5(a-b)(a+b)-4(a-b)=(a-b)[5(a+b)-4]=(a-b)(5a+5b-4)2、 3a-ax-3b+bx = 3a-3b-ax+bx =3(a-b)-x(a-b)=(3-x)(a-b)3、 6a²-35xy+10ay-21ax...
答:1.-a+2a²-a³=-a(1-2a+a²)=-a(1-a)²2.9(x+2y)²-25(x-2y)²=[ 3(x+2y) ]²-[5(x-2y) ]²=[3(x+2y)+5(x-2y)][3(x+2y)-5(x-2y)]=(8x-4y)(-2x+16y)=-8(2x-y)(x-8y)3.x²+x+_1/4__=( ...
答:1.x^2y^2-x^2-y^2+4xy+1 =(x^2y^2-2xy+1)-(x^2-2xy+y^2)=(xy-1)^2-(x-y)^2 =(xy-x+y)(xy+x-y)2.(x-2)/(x-3)=4-2/(x^2-6x+9)(x-2)/(x-3)=4-2/(x-3)^2 x≠3 同时乘(x-3)^2,得:(x-2)(x-3)=4(x-3)^2-2 x^2-5x+6=4x^2-24x+...
答:(1)(x-y)^3-(y-x)^2 =(x-y)^3-(x-y)^2 (提出公因子(x-y)^2)=(x-y)^2*(x-y-1)(2)5a^2(x-y)+10a(y-x)=5a^2(x-y)-10a(x-y) (提出公因子5a(x-y))=5a(x-y)(a-2)(3)(m-n)^2-10(n-m)+25 =(m-n)^2+10(m-n)+25 (完全平方公式)=(m-n...
答:5a^2(x-y)+10a(y-x)=5a^2(x-y)-10a(x-y)=5a(x-y)(a-2)a(x-3)(y-2)+b(3-x)(2-y)=a(x-3)(y-2)+b(x-3)(y-2)=(x-3)(y-2)(a+b)x^2+y^2/9-2/3 xy =(x-y/3)^2 (m^2+1)^2+4m(m^+1)+4m^2 =(m^2+1+2m)^2 =(m+1)^4 8ax+12ay-...
网友评论:
燕泊18491763984:
初一因式分解计算题50道,要求格式正确,平方和立方要上标, -
19200拔叶
:[答案] 一:书写上去的: 1、4x^2yz-12xy^2z+18xyz^2 2、(a-2b)^2-(3a-2b)^2 3、2x^5-32x 4、-16a^2+9(2a-b)^2 5、1/3mn^3-1/12m^3n6、12x-12x^2+3x^3 7、-36z^2+12xyz-x^2y^2 8、(a+b)^2(a-b)+(a+b)(a-b)^2 9、24ab^2c^2(a+b-c)-32abc(c-a-b)^2+8abc^3(...
燕泊18491763984:
找100道初一因式分解数学题必须100道,判断题,应用题. -
19200拔叶
:[答案] 1.若2x3+3x2+mx+1为x+1的倍式,则m= 2.因式分解3a3b2c-6a2b2c2+9ab2c3= 3.因式分解xy+6-2x-3y= 4.因式分解x2(x-y)+y2(y-x)= 5.因式分解2x2-(a-2b)x-ab= 6.因式分解a4-9a2b2= 7.若已知x3+3x2-4含有x-1的因式,试分解x3+3x2-4= 8.因式分解ab(x2-...
燕泊18491763984:
请给我100道初一因式分解的习题.谢谢!不要太复杂,要基础题. -
19200拔叶
:[答案] 1.(3a-b)2-4(3a-b)(a+3b)+4(a+3b)2=[3a-b-2(a+3b)]^2=(a-7b)^22.(a+3)2-6(a+3)=(a+3)(a-3) 3(x+1)2(x+2)-(x+1)(x+2)2=-(x+1)(x+2) 4.abc+ab-4a=a(bc+b-4)5.16x2-81=(4x+9)(4x-9)6.9x2-30x+2...
燕泊18491763984:
求60道因式分解题目!初一下册得就可以了、 -
19200拔叶
:[答案] 1.下列因式分解中,正确的是( (A) 1- x2= (x + 2) (x- 2) (B)4x –2 x2 – 2 = - 2(x- 1)2 (C) ( x- y )3 –(y- x) = (x – y) (x – y + 1) ... (x>0),其中一边长为2x+1,则另为___ . 43.把a2-a-6分解因式,正确的是( ) (A)a(a-1)-6 (B)(a-2)(a+3) (C)(a+2)(a-3...
燕泊18491763984:
初一数学因式分解的15个题帮解下,谢谢了最好全把答案告诉我,请高手解下,谢谢了,是因式分解.大家应该看的懂,比如:6a3就是6a3的3次方.1、6a3 - ... -
19200拔叶
:[答案] 不要看他们错的 1 2a(3a2-4a-2)=2a(5a2-2(a+1)2) =2a(根号5a-根号2a-根号2)(根号5a+根号2a+根号2) 2 -xy(xy-1)2 3 (a-y)(x+a+y) 4 (a-3b)(a+3b) 5 (a+0.5)2 6 (x+1)2*(x-1)2 7 -(x-1)2*(x+1)2 8 (a-2b)(a2+2ab+4b2) 9 (m+n)(m-n)(2m+3n2)(4m2-6mn2+...
燕泊18491763984:
初一数学因式分解的15个题帮解下,谢谢了 -
19200拔叶
: 不要看他们错的 1 2a(3a2-4a-2)=2a(5a2-2(a+1)2) =2a(根号5a-根号2a-根号2)(根号5a+根号2a+根号2) 2 -xy(xy-1)2 3 (a-y)(x+a+y) 4 (a-3b)(a+3b) 5 (a+0.5)2 6 (x+1)2*(x-1)2 7 -(x-1)2*(x+1)2 8 (a-2b)(a2+2ab+4b2) 9 (m+n)(m-n)(2m+3n2)(4m2-6...
燕泊18491763984:
求10道难度较高的初一几何,因式分解数学题如题 -
19200拔叶
:[答案] .分解因式:(1)a的二次方+14ab+45b的二次方(2)a的二次方-9ab+20b的二次方 .分解因式:a的四次方-5a的二次方+4 .分解因式:2a+4+3ab+6b 17、—7x2y3+42x3y2—14x3y3 18、x2(x—y)—3xy(y—x) 19、a4—2a2b2+b4 20、 ...
燕泊18491763984:
初一因式分解试题①32a(x^2+x)^2+2a②16+8(x^2+4x)+(x^2+4x)^2③3x^(n)y+9x^(n - 1)y^2+1/4x^(n+1) -
19200拔叶
:[答案] ① 题目有点问题,应该是-2a,不然没法分解了32a[(x^2+2x)^2]-2a =2a[16(x^2+2x)^2-1] =2a(4x^2+8x+1)(4x^2+8x-1) ② 16+8(x^2+4x)+(x^2+4x)^2 =(4+x^2+4x)^2 =(x^2+4x+4)^2 =(x+2)^4 ③ 3x^ny+9x^(n-1)y^2+x^(n+1)/4...
燕泊18491763984:
初一因式分解试卷及答案!快!急!题目不要太多!4面!赏20! -
19200拔叶
:[答案] 1、y^2-2y-x^2+1 2、(3a+2b)^2-2(3a+2b)(2b-3a)+(3a-2b)^2 3、 -m^3n^3+4m^2n^2-mn 4、 (x+1)(x+3)(x+5)(x+7)+15 5、 x^2-2xy+y^2-13x+13y+30 6、 4(x+2z)(x-2z)+12xy+9y^2 7、 a^4+(a+b)^4+b^4 8、 6x^2-7xy-3y^2-x...
燕泊18491763984:
初一因式分解题.30道. -
19200拔叶
: ^1,X^e79fa5e98193e58685e5aeb931333236393765-15X+26 =(x-13)(x-2) 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...