已知5xˆ2-3x-5=0,则5xˆ2-2x-1/5xˆ2-2z-5=( )
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
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x-y+z=0,3x+y-5z=0,则x+y+z/x+2y-3z=?
已知x-y+z=0.3x+y-5z=0,则x+y+z/x+2y-3z=_______
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z均不为0,求3x*x+2y*y+5z*z/5x*x+y*y-
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求(3x*x+y*y+4z*z)/(5x*x+y*
已知x+2y-3x=0,2x+3y+5z=o.求x+y+z除以x-y+z
已知2x+3y-4z=0,3x+3y+5z=0,求x+y+x/x-y+z的值
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
已知2x+5y+4z=15.7x+y+3z=14 则x+y+z=?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知实数x满足5x*x-3x-5=0,求代数式5x*x-2x-1/5x*x-2x-5的值.