6x十8x=28、5.3x一4.6x=4.2、0.7x十4=102、6x十8x=28、5.6x十2.2=30.2、3x—
6x十8x=28、5.3x一4.6x=4.2、0.7x十4=102、6x十8x=28、5.6x十2.2=30.2、3x—
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
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)=
x十5十x十6…=1000
X十1十4/5X=1十7/8(X-1)十(X一1)怎么算
4(X十3)=6x
X.(X十1)x(X十2)x(x十3) =360
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十3
3x十7x十5x一7x=17十18
2x十5=17,8x-3x=6.5,6x十3x=36,
解方程:(x一3)(x十1)=x(2x十3)一(x的平方十1)