Question

2x-2/x=3求x的4次方+1/x的四次方的值

Answer 1

2x-2/x=3

x-1/x=3/2 平方

x^2-2+1/x^2=9/4

x^2+1/x^2=9/4+2=13/4 平方

x^4+2+1/x^4=169/16

x^2+1/x^4=169/16-2=137/16