2x十5=17,8x-3x=6.5,6x十3x=36,

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 2x十5=17,8x-3x=6.5,6x十3x=36, 5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=15x十2x=4215十2x一3=482x十3x十17=376x一3x=6÷59x一2x=1.4十0.077(2x一6)=15.4 X.(X十1)x(X十2)x(x十3) =360 3x十7x十5x一7x=17十18 x十1/3[x十1/3(x-9)]=1/9(x-9)-1解方程; 1/9{1/7[1/5((x十1/3[x十1/3(x-9)]=1/9(x-9)-1解方程; 1/9{1/7[1/5((x十2)/3十4)十6]十8}=1求x! 3十x十x=5x, x十5十x十6…=1000 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) x^5十3x=?和2x^3-4x+6=? 6x(x-2)-10=5x(x十8) 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)= 2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥ 1/x^2一6x十8=1/x^2一4x十3x^2一6x十8和x^2一4x十3 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 4(X十3)=6x x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? *-----------------------------------------------*| 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 ||