Question

5. If x^ 2 + 1/ x^ 2 =9, find the value of x ^ 4 + 1/(x ^ 4)​

Answer 1

Answer:

squaring at both side

so the value will be 81

Answer 2

Step-by-step explanation:

x^2 + (1/x^2) = 9

Squaring on both side

(x^2 + (1/x^2))^2 = (9)^2

x^4 +2 + (1/x^4) = 81

x^4 + (1/x^4) = 79