Question

x¹⁵=x

Answer 1

=> x=0 ; x=1 ; x=-1 tick nha trinh cong minh

Answer 2

x¹⁵=x

=>x¹⁵-x=0

=>x(x¹⁴-1)=0

=>x(x⁷-1)(x⁷+1)=0

=>x=0;x⁷-1=0 hoặc x⁷+1=0

=>x=0;x⁷=1 hoặc x⁷=-1

=>x=-1;0;1

Vậy x=-1;0;1