Question

Berapakah nilai x jika diketahui persamaan sebagai berikut : x2+1/x2=10

Answer 1

X^2 + 1 / X^2 = 10
X^2 + 1 = X^2 x 10
X^2 = 10 - 1
X^2 = 9
X = akar 9
X = 3.

Answer 2

(x^2 + 1) / x^2 = 10
(x^2 + 1) = 10 * ( x^2)
x^2 + 1 = 10x^2
1 = 10x^2 - x^2
1 = 9x^2
(1)^2 = (3x)^2
(ditarik akar kiri kanan)
1 = 3x
x = 1/3