(x-2)/(x+2)=(x+2)/(x-2)+16/(x平方-4)
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(x-2)/(x+2)=(x+2)/(x-2)+16/(x平方-4)
(x-2)/(x+2)=(x+2)/(x-2)+16/(x平方-4)
(x-2)/(x+2)=(x+2)/(x-2)+16/(x平方-4)
原式=(x-2)^2/(x^2-4)-(x+2)^2/(x^2-4)-16/(x^2-4)=0
(x-2)^2-(x+2)^2-16=x^2-4
x^2+8x+12=0
(x+2)(x+6)=0
解得: x=-6或x=-2
因为x不等于2或-2
所以方程解得x=-6
f(x)=x^2+x (x
300字读后感 2篇 俄把格式说一下吧:《xxxx》(写题目)主要内容:x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x(写那篇文章的主要内容)思考分析:x x x
x^2=x
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x平方-x+2=2x/x+1
f(x)=x|x|+2x (x
(X+1)X(X+2)X(X+3)=504
*-----------------------------------------------*| 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 ||
分解因式:x*x*x*x+2*x*x*x-9*x*x-2x+8
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*x-6x-9)-x(x*x-8x-15)+2x(3-x)
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x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x/x-2-x/x+2)/4x/x-2
分解因式----(X*X-X)(X*X-X-2)+1
|-x|+|x+2|-|2-x|