If x - 1/x = 8 , the value of x^2 + 1/x^2 - 8 , the value of is : 1. 56 2. 58 3. 70 4. -4

Answered By

For x = 5 and y = 3, the value of x² + y² - 2xy + 7 is :
11
169
71
1