2(5x×2x+5×5x+2x×5)=40怎么算的,
2X=5X怎么算?
(x+5)^2=10+(x+5)x怎么算
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
2(x-1)(x+5)-3(x-2)-4x=2x的平方+7方程题怎么算?
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
3x的平方-x(2x+3)=x(x-5)-2(2x+3)
2x/(x^2+x)-1/x=5/(x+1)怎么做?
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)