3x十9x十X=26.
1十3十5十7十9十11十、、、、、、十99=()=()x()
X.(X十1)x(X十2)x(x十3) =360
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
3x十7x十5x一7x=17十18
2x十8十3x十8十4x十8=?请算出这道题目求士寸佰了⑥
2(x十3)=3(0.5x十10)
40十x=3(12十x)怎么解?
4X十3(X十1)=31
x十5十x十6…=1000
解方程(3x十3)(x十2)=x十14
4(X十3)=6x
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)=