初一数学因式分解100道
答:一 x(x-4)-2(x-4)=0 (x-2)(x-4)=0 所以x=2或x=4 xy^2-4x^2-1/16y^4=-(4x^2-xy^2+1/16y^4)=-(2x-1/4y^2)^2 3a(x^2+4)^2-48ax^2=3a[(x^2+4)^2-16x^2]=3a[(x^2+4+4x)(x^2+4-4x)]=3a(x+2)^2*(x-2)^2 (x-2y)^2+10(2y-x)+25=(x...
答:9、原式=a^2(a+1)-(a+1)=(a+1)(a^2-1)=(a+1)^2(a-1);10、原式=X^2(X-Y)-(X-Y)=(X-Y)(X^2-1)=(X-Y)(X+1)(X-1);11、原式=-a(a^2-2ab+b^2)=-a(a-b)^2;12、原式=(2X-YZ)^2-4Z^2=(2X-YZ+2Z)(2X-YZ-2Z);13、原式=(X-9)(X+...
答:-9x^2+y^2=y^2-9x^2 =(y-3x)(y+3x)(x-y)^2-10(y-x)+25 =(x-y)^2+10(x-y)+25 =(x-y+5)^2 (m+n)^2+10(m+n)+25 =(m+n+5)^2 (a+b)^2-100 =(a+b)^2-10^2 =(a+b+10)(a+b-10)4(a+2b)^2-36(a-b)^2 =[2(a+2b)]^2-[9(a-b)]^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:81(a-b)^2-16(a+b)^2 =(9a-9b+4a+4b)(9a-9b-4a-4b)=(13a-5b)(5a-13b)49(a-b)^2-16(a+b)^2 =(7a-7b-4a-4b)(7a-7b+4a+4b)=(3a-11b)(11a-3b)(a^2+b^2)^2-a^2b^2 =(a^2+b^2-ab)(a^2+b*2+ab)...
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、设y=x²- 4x ,原式=y²-y-20=(y+4)(y-5),将y=x²- 4x 代入上式得:(x²- 4x+4)(x²- 4x-5)=(x-2)²(x- 5)(x+1)。2、设y=a²+5a,原式=(y+3)(y-2)-6=(y-3)(y+4),将y=a²+5a代入上式得:(a²...
答:1.(X-1)2-Y2/X+Y-1 =(X+Y-1)(X-Y-1)/(X+Y-1) =X-Y-1 2.(X2-1)2/(X+1)2 =(X+1)2(X-1)2/(X+1)2 =(X+1)2 3.(a2-4)(a2+4)/a-2 =(a+2)(a-2)(a2+4)/(a-2) =(a2+4)(a+2) 字母旁的是二次方。希望能帮助你。这些不...
答:平方差公式:a^2-b^2=(a+b)(a-b)x^2-(x-y)^2=[x+(x-y)][x-(x-y)]=(2x-y)*y=2xy-y^2 4x^2-(x-y)^2=(2x)^2-(x-y)^2=[2x+(x-y)][2x-(x-y)]=(3x-y)(x+y)=3x^2+2xy-y^2 -(a+b)^2+(2a-3b)^2=(2a-3b)^2-(a+b)^2=[(2a-3b)+(a...
答:x^8+x^4+1 =x^8+2x^4+1-x^4 =(x^4+1)^2-x^4 =(x^4+1+x^2)(x^4+1-x^2)= (x^4+2x^2+1-x^2)(x^4-x^2+1)=[(x^2+1)^2-x^2](x^4-x^2+1)=(x^2+x+1)(x^2-x+1)(x^4-x^2+1)
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越乳13244599004:
找100道初一因式分解数学题必须100道,判断题,应用题. -
11490尚咸
:[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-...
越乳13244599004:
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. -
11490尚咸
:[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...
越乳13244599004:
急需100道初一因式分解题`````帮帮忙啊!!!!!!!!~~~
11490尚咸
: 一、选择题nbsp;(nbsp;)1.下列多项式中何者含有2x+3的因式nbsp;(1)2x3+3nbsp;(2)4x2-9nbsp;(3)6x2-11x+3nbsp;(4)2x2+x+3nbsp;(nbsp;)2.下列何者是2x2-11x-21的因式?nbsp;(1)(x-6)nbsp;(2)(x+7)nbsp;(3)(2x-3)nbsp;(4)(2x+3)nbsp;(nbsp;)3.下列...
越乳13244599004:
100道初一计算题,200道因式分解苏教版的.计算题100道,因式分解200道.两天内~哪为大哥大姐帮我一下,我只要题目,不要答案ps:(2a+3b)^2 计算ps:36 - ... -
11490尚咸
:[答案] [-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3) 5+21*8/2-6-59 68/21-8-11*8+61 -2/9-7/9-56 4.6-(-3/4+1.6-4-3/4) 1/2+3+5/6-7/12 [2/... ÷(-616)÷(-28) (8+14-100-27)÷4 (-15) ÷(-1)-101÷10 16÷0.21*(-8) *(4.1+5.9) (-10) *(-2) *4÷{-9÷[6+(-5.67)]} (-18)(-4)2*[8.01*(-3....
越乳13244599004:
数学因式分解100道随便上 30分 -
11490尚咸
:[答案] 因式分解练习题 一、填空题: 2.(a-3)(3-2a)=_______(3-a)(3-2a); 12.若m2-3m+2=(m+a)(m+b),则a=______,b=______; 15.当m=______时,x2+2(m-3)x+25是完全平方式. 二、选择题: 1.下列各式的因式分...
越乳13244599004:
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 - ... -
11490尚咸
:[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+...
越乳13244599004:
求10道难度较高的初一几何,因式分解数学题如题 -
11490尚咸
:[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、 ...
越乳13244599004:
初一数学因式分解 -
11490尚咸
: 1.m(x+y)-n(x+y)=(x+y)*(m-n)2.(xy^2-2xy)+(2y-4)=xy(y-2)+2(y-2)=(xy+2)(y-2)3.16m(a+2b)-4n(a+2b)=(a+2b)(16m-4n)=4(a+2b)(4m-n)4.a(x-y)^2-b(y-x)=.a(x-y)² + b(x-y)=(x-y)(ax-by+b)如果你满意,请采纳,谢谢!
越乳13244599004:
急求200道因式分解题(或整式的乘除)及答案 -
11490尚咸
:[答案] .把下列各式分解因式 (1)12a3b2-9a2b+3ab; (2)a(x+y)-(a-b)(x+y); (3)121x2-144y2; (4)4(a-b)2-(x-y)2; (5)(x-2)2+10(x-2)+25; ... 又刚好摆成一个正方形(如图2).试问:这种小球最少有多少个? 怎么样100道够了吧! 参考资料:初二数学因式分解题...
越乳13244599004:
初一数学因式分解题 -
11490尚咸
: A²-B²+B-1/4=A²-(B²-B+1/4)=A²-(B-1/2)²=(A+B-1/2)(A-B+1/2)4(X²+Y)(X²-Y)-(2X²-Y)²=4(X^4-Y²)-(4X^4-4X²Y+Y²)=4X^4-4Y²-4X^4+4X²Y-Y²=4X²Y-5Y²=4*4*(-5)-5*25=-205