Question

find x and x is not equal to zero​

Answer 1

Answer:

x= 1/3 or x=3

Step-by-step explanation:

x2 + 1/x2 = 82/9

(x4 + 1)/x2 = 82/9

9(x4 + 1) = 82× x2

9x4 + 9 = 82 x2

9x4 -82x2 +9 = 0

9x4 -81x2 -1x2 +9 = 0

9x2(x2-9) -1(x2-9) = 0

(9x2-1) (x2-9) = 0

9x2-1 = 0 or x2-9 = 0

9x2= 1. or x2 = 9

x2= 1/9 or x2 = 9

therefore,, x= 1/3 or x= 3