Mohon bantuannya

X^1/2 + x^-1/2 =2
kedua ruaa kuadratkan maka
x^1 + x^0+x^0 + x^-1 = 4
x + 1/x =4-2
x + 1/x =2 kuadratkan lagi
maka
x²+x^0+ x^0 + x^-2 =16
x²+x^-2 =16-2
x²+x^-2=14