(1+x)(1-5%)=1+14%
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知x*x-5x=14,求(x-1)(2x-1)-(x+1)*(x+1)+1的值
(x-1)(2x-1)-(x+1)2+1,其中x²-5x=14,
已知x²-5x=14,求(x-1)(2x-1)-(x+1..
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
1、14x(x+6)-6x=8x(2x+5)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
5x-2(7x+1)=14x
x-2/5x+14=1/4x,