Question

Factor.
4x^2 - 20xy + 25y^2

Answer 1

(2x-5y)^2

Explanation:

4x^2 - 20xy + 25y^2=

(2x) ^2 - 2(2x)(5y)+(5y)^2 =(*)

(2x-5y)^2

(*) A^2 - 2AB+B^2 =(A-B)^2