3(3x+8)=2(2x十12)
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.(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
3(3x+8)=2(2x十12)
2(x十3)=3(0.5x十10)
解下列方程组; (1) [x十y=8,5x十1=2(x十y); (2)[2x十5y=12,2x十3y=6.
2x十5=17,8x-3x=6.5,6x十3x=36,
解方程(3x十3)(x十2)=x十14
解方程:(x一3)(x十1)=x(2x十3)一(x的平方十1)
12(2-3x)=4X十4
1/x^2一6x十8=1/x^2一4x十3