(3x^2-2x+1)(3x^2-2x-7)=0

来源：学生作业帮助网编辑：作业帮时间：2024/05/09 20:15:41

(3x^2-2x+1)(3x^2-2x-7)=0
(3x^2-2x+1)(3x^2-2x-7)=0

(3x^2-2x+1)(3x^2-2x-7)=0
由(3x^2-2x+1)(3x^2-2x-7)+12=0得(3x^2-2x+1)(3x^2-2x+1-8）+12=0
有(3x^2-2x+1)^2-8(3x^2-2x+1)+12=0
即(3x^2-2x+1-6）(3x^2-2x+1-2）=0
即有3x^2-2x-5=0或者3x^2-2x-1=0,可解得x=5/3或x=-1或x=-1/3或x=1
经检验,所有根均为原方程的解,故可得x=5/3或x=-1或x=-1/3或x=1

由(3x^2-2x+1)(3x^2-2x-7)+12=0得(3x^2-2x+1)(3x^2-2x+1-8）+12=0
有(3x^2-2x+1)^2-8(3x^2-2x+1)+12=0
即(3x^2-2x+1-6）(3x^2-2x+1-2）=0
即有3x^2-2x-5=0或者3x^2-2x-1=0，可解得x=5/3或x=-1或x=-1/3或x=1
经检验，所有根均为原方程的解，故可得x=5/3或x=-1或x=-1/3或x=1

*-----------------------------------------------*| 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(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 |x+1|-|x|+|x-2|-|-x+3|已知x+2 x{x+1}{x-1}}x-2}{x-3}-40 x^5-x^4+x^3-x^2+x-1 (X+1)X(X+2)X(X+3)=504 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 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 x(x-2)(x-3) {x|(x+3)(x-2) -x^3+x^2-x x×x+3x-9/ x+2 x+2x+3x+.+100x (x*x-3)*(x*x-3)-x*(x*x-3)-2x*x 因式分解