Question

Find the value of x square +1 by xsquare when x = 4 + root 15​

Answer 1

Answer:

8

Step-by-step explanation:

(X^2 + 1)/x^2 can be express as

x + 1/x

so rationalise 1/x if x= 4 + root 15

as 4- root 15/1

4+ root 15 + 4- root15

8