(1)9x-25=0 (2)4(2x-1)²=36 (3)(x+1)²-81=0 (4)(2x+3)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
解方程 (3x+1)(3x-1)=(x+2)(9x-4) 2(x-3)(x-2)-(x+3)²=(x-1)(x
解方程(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=0
3x²-(x-2)=0 (2x-1)(x+3)=4 x²-3x-4=0 x²-3x+18=
x²+3x-2=0,x²-6x-6=0,3x²-4x-1=0,3x²+10x+3
(x-2)²=(2x-3)² x²-4x=0 3x(x+1)=3x+3 x²-2
2x(x-1)=0 x²+4=4x (x-3)(x+1)=0 x²-3x+1=0
用适当方法解方程(x+6)²-9=0 x²-2x+1=25 4x²+12x+9=81 3x
(X-1)(X-2)=70,(3-X)²+2X(X-1)=0,-3X²-4X+4=0,(3-X)