No 18 tolong ya. gak temu
Jawaban Terkonfirmasi
X² – 4x = -1
(x -2)² = -1 + 4= 3
x real positip
x = 2 +√3
x² = (2+√3)² = 7 + 4√3
1/x² = 1/ (7+4√3) . (7-4√3)/(7-4√3) = (7 – 4√3)/(49-48)= 7 – 4√3
x² + 1/x² = 7 + 4√3+ 7 – 4√3= 14
No 18 tolong ya. gak temu
X² – 4x = -1
(x -2)² = -1 + 4= 3
x real positip
x = 2 +√3
x² = (2+√3)² = 7 + 4√3
1/x² = 1/ (7+4√3) . (7-4√3)/(7-4√3) = (7 – 4√3)/(49-48)= 7 – 4√3
x² + 1/x² = 7 + 4√3+ 7 – 4√3= 14