x^5十3x=?和2x^3-4x+6=?
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.(X十1)x(X十2)x(x十3) =360
4(X十3)=6x
2x十5=17,8x-3x=6.5,6x十3x=36,
x(x-14)二0*x平方十|2x十27=0,x平方=x+56,x(5x+4)=5x+4,4x平方-45=3|x,-3x
5x十2x=42 15十2x一3=48 2x十3x十17=37 6x一3x=6÷5 9x一2x=1
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
若A=(3x^2)十5x 2 B=(4x^2)十5x十2 a和b的大小
4x十6y=48 3x十5y=38求x和y
2x²—5x十x²+4一3x²=?
2x+3x+4x+5x+x+6x+7x=100
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)=