18+6x=2x+34咋算?
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
X(x+3)分之一+(X+3)(X+6)分之一+(X+6)(X+9)分之一=2x+18分之三
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
2x+3x+4x+5x+x+6x+7x=100
若x^2-8x+13=0求(x^4-6x^3-2x^2+18x+23)
方程(x^3-3x^2+x-2)(x^3-x^2-4x+7)+6x^2-15x+18=0的全部相异实根是
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
x^2=(x+30)X(x-18)怎么解
(x^2 + x)^2+ (x^2 + x)=6
X^2+X分之6=X^2+X+1