2x-a/x^2+(x+3)/(x+1)=5 a为何值时方程有增根RT这才是题目...(2x-a)/(x^2-1)+(x+3)/(x+1)=5

a+x/x+1 ,x/x^2-2x-3 ,a/x^2+4x+3 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. x^2-6x+5= A(x-2)(x-3)B(x-6)(x+1) x^2-x/x+1÷x/x+1 ；x^2+6x+9/x^2-9÷x+2/x-3；2/a÷4/a x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 2x-3/x^2-x-A/x-1+B/x求A+B |x+1|-|x|+|x-2|-|-x+3|已知x+2 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X x{x+1}{x-1}}x-2}{x-3}-40 x^2+x+a (x-a)(x-2) x^5-x^4+x^3-x^2+x-1 (X+1)X(X+2)X(X+3)=504 计算:1/(a-x)-1/(a+x)-2x/(a^2+x^2)-4x^3/(a^4+x^4) 化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x) 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X