Question

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

Answer 1

Answer:

79

Step-by-step explanation:

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

squaring both sides

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

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

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