3x^2-X+2=0 deerta=(-1)^2-4X3X2=-23
3x²-(x-2)=0 (2x-1)(x+3)=4 x²-3x-4=0 x²-3x+18=
1个回答
相关问题
-
1.x^2-3x-18=0 2.x^2+3x-5=0 3.x^2-4x-7=0 4.3^2-6x-9=0 5.3x^2-
-
(x1-x2+4x3-2x4=0;x1-x2-x3+2x4=0;3x1+x2+7x3-2x4=0;x1-3x2-12x3
-
3(x+2)-4(x-1)+2(3x-1)-18=0
-
3（x+2）-4（x-1）+2(3x-1)-18=0
-
线性代数,x1+x2-3x3-x4=0 3x1-x2-3x3+4x4=0 x1+5x2-9x3-8x4=0
-
X1 - X3 - X4 -5X5=0 X1+2X2+3X3+3X4+7X5=0 X1+X2+X3+X4+X5=0 X2
-
x1+x2+2x3-x4=0 { -x-3x3+2x4=0 2x1+x2+5x2-3x4=0 的一般解
-
求线性方程组{X1+X2+2X3-3X4=0; X1+2X2-X3+2X4=0; 2X1+3X2+X3-X4=0}的基础
-
设齐次方程组x1+x2+x3+ax4=0；x1+2x2+x3+x4=0；x1+x2-3x3+x4=0；x1+x2+ax3
-
求齐次线性方程组 x1-x2+5x3-x4=0;x1+x2-2x3+3x4=0;3x1-x2+8x3+x4=0;x1+3