5X十8(32一X)=250,
X十1十4/5X=1十7/8(X-1)十(X一1)怎么算
(x十3)(x一3)十8>(x十5)(x一1)解不等式
(2X一)(X十3)=3X十5
3x十7x十5x一7x=17十18
5(x一2)十8<6(x一l)十7
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)=
化简求值:(X一3)(X一2)十(X一1)(X十3)一2(X平方一X十8)(其中X=6).
5(x十20)一3(x十7)=100怎样解方程
1/2(2X十5)=4x十3/4一2一3x/8,解方程
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十2)(X一13)一16=(X十3)( )
7(x十4)=2(2一x)十3(4x一2) 6(2x一7)=5(x十8)十9 5(1十2x)=3(x一2)十3(17一x