X3+3X+2X3-3X2-3X3+3X2+3X=12
x1,x2,x3,是x^3+px+2=0的三个根,计算行列式 :|x1 x2 x3| |x2 x3 x1| |x3 x1
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
x1,x2,x3是方程x^3+px+q=0的根,求三阶行列式x1 x2 x3,x3 x1 x2,x2 x3 x1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
分解因式 x3+x2+x-3 x3-6x2+11x-6 x4+x3-7x2-x+6
化简求值:2x3+4x-2x2-(x+3x2-2x3),其中x=-2.
x3+3x2+2x=0这么解啊?
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
matlab习题,解下列方程组x1+x2+x3+x4=02x1+3x2-x3-x4=23x1+2x2+x3+x4=53x
化简并求值:3x3-[x3+(6x2-7x)]-2(x3-3x2-4x)其中x=-1.
先化简,再求值:3x3-[x3+(6x2-7x)]-2(x3-3x2-4x),其中x=13
证明:(x3+5x2+4x-1)-(-x2-3x+2x3-3)+(8-7x-6x2+x3)的值与x无关.