Question

x + 1/x = 5; halla: x^2 + 1/x^2
ayuda porfavor es para hoy urgente <3

Answer 1

(x + 1/x)^2  = 5^2

x^2 + 2(x)(1/x) + 1/x^2 = 25

x^2 + 2 + 1/x^2 = 25

x^2 + 1/x^2 = 25 - 2

x^2 + 1/x^2 = 23

R//: 23