Question

(question 1):- if x + 1/x = 3, find the value of x^4 + 1/x^4. (question 2):- if y^2 + 1/y^2 = 6, find the value of y - 1/y.

Answer 1

Step-by-step explanation:

For the 2nd problem

y^2+(1/y^2)=[y-(1/y)]^2+2=6

or, [y-(1/y)]^2=4

or,y-(1/y)=+-2