1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)=
1/(x^2一4x十3)十1/(x^2一8x十15)十1/(x^2-12x十35)十1/(x^2一16x十63)=
解方程:(x一3)(x十1)=x(2x十3)一(x的平方十1)
已知1十x十x^2 十x^3=0,求x十x^2十x^3十x^4+x^5十x^6+x^7十x^8的值
X.(X十1)x(X十2)x(x十3) =360
(x十3)(x一3)十8>(x十5)(x一1)解不等式
X十1十4/5X=1十7/8(X-1)十(X一1)怎么算
1/x^2一6x十8=1/x^2一4x十3
设(3x一1)^8=a8x^8十a7x^7十…a1x十ao 求(1) a8十a7十…十a1 (2) a8十a6十a4十a
三x一4x的平方十7一3x十2x的平方十1=?.x=一3
5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=1
计算:6x2一(2x一1)(3x一2)十(x十2)(x一2)一x(x十7)这题怎么做?
x*2一3x十1=0则x*4十x*一4二多少