X^3=540 有冇公式架 ?

x^3=540 點計呀? 有冇公式架?
Sol
x^3=540
x^3－540=0
x^3－(540^(1/3))^3=0
540^(1/3)=8.1432528
we have x^3－y^3=(x－y)(x^2+xy+y^2)
So
x^3－(540^(1/3))^3=0
x^3－8.1432528^3=0
(x－8.1432528)(x^2+8.1432528x+66.312566)=0
x=8.1432568 or x=(－8.1432568+/-√(8.1432568－4*1*66.312566))/2
x=8.1432568 or x=(－8.1432568+/-14.104534i)/2
x=8.1432568or x=－4.0716284+/-7.052267i

x^3=540
x=8.14325285
從X里乘3次=540

呢個係540自x3次