{5X Y=5,6x-y=8如何解答

问题描述:

{5X Y=5,6x-y=8如何解答

x不为0
xy=1,y=1/x
6x-1/x=8
6x^2-8x-1=0
x=[8+(-)sqrt(8^2-4*6*(-1))]/2*6