8X+X³/18=36等价于
X³+144X-648=0
符合一元三次方程的特殊形式:X³+pX+q=0
p=144,q=-648
x1+x2+x3=0
x1x2+x2x3+x3x1=p
x1x2x3=-q
解这个方程有:
X1=4.04155834931226;
X2=-2.02077917465613 + 12.5000258167002 i;
X3=-2.02077917465613-12.5000258167002 i
8X+X³/18=36等价于
X³+144X-648=0
符合一元三次方程的特殊形式:X³+pX+q=0
p=144,q=-648
x1+x2+x3=0
x1x2+x2x3+x3x1=p
x1x2x3=-q
解这个方程有:
X1=4.04155834931226;
X2=-2.02077917465613 + 12.5000258167002 i;
X3=-2.02077917465613-12.5000258167002 i