Question

x^2 - 2/5xy + y^2/25 - 1 factorize the following by completing the squares​

Answer 1

x^2 - 2/5xy + y^2/25 - 1

= (x)^2 - 2 (x) (1/5)y + (y/5)^2 - 1

= (x - y/5)^2 - (1)^2

= (x - y/5 + 1) (x - y/5 -1)