Question

помогите!!! упростите выражение (m-n)^2+2n(m-n)+n^2

Answer 1

(m-n)^2+2n(m-n)+n^2=м^2-2mn+n^2+2mn+2n^2+n^2=m^2-4nm+4n^2=(m-2n)^2

Answer 2

(m-n)²+2n(m-n)+n²=(m-n+n)²=m²