Question

If x^2+1/x^2=7 find x+1/x

Answer 1

Step-by-step explanation:

We have,

x^2 + 1/x^2 = 7

So, using

【(a + b) ^{2} = a ^{2} + b^{2} + 2ab】

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

(x + 1/x)^2 = 7 + 2

(x + 1/x)^2 = 9

x + 1/x = √9

x + 1/x = 3

4.8

hope it help

Answer 2

Answer:

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

=7+2=9

x+1/x=3