Х∧2- 4ху + 4у∧2- 4 у∧4

Question

Х∧2- 4ху + 4у∧2- 4 у∧4

Answer 1

(Х^2-4ху)+(4у^2-4у^4)= х(х-4у)+4у^2(1-у^2)=(х+4у^2)+(х-4у)(1-у^2)