X2+X-1=0则2X3+3X2-X=?
若x2+x-1=0,则2x3+3x2-x( )
设X1,X2,X3是方程X^3+px+q=0de三个根,则|x1 x2 x3|= |x3 x1 x2| |x2 x3 x
已知x2+x+1=0则x3+2x2+2x-6=
x2-x-1=0,则2x3+7x2-11x+2012=______.
已知x2+x-1=0,求2x3+3x2-x的值.
问一个线性代数问题:X1 X2 X3是X*3+qx+p=0的解,则行列式 X1 X2 X3 X3 X1 X2 X2 X3
x2+x=1求x3+2x2-7
用列主元Gauss消元法解线性方程组{-x2-x3+x4=0,x1-x2+x3-3x4=1,2x1-2x2-4x3+6x
已知x2+x-1=0,则x3+2x2+2004=______.
已知x2+x-1=0,则x3+2x2+2011=______.
已知x2-x-1=0,则-x3+2x2+2005的值为______.
已知x2+x-1=0,求x3+2x2+3的值.