5(2X-2)-4X=7(X-2)怎么算

7x(x-6)+3x=4x(2x+5)怎么解这个方程 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 2(x-1)(x+5)-3(x-2)-4x=2x的平方+7方程题怎么算? 2x+3x+4x+5x+x+6x+7x=100 7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出 2X=5X怎么算? x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x (x+5)^2=10+（x+5)x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 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 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 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),