Question

Упростите выражение.
(m+5)²-(m-5)²

Answer 1

(m+5)^2 -(m-5)^2
(m+5-m+5)(m+5+m-5)= 20m
Ответ: 20m.

Answer 2

$(m+5)^2-(m-5)^2=m^2+2bullet 5m+5^2-(m^2-2bullet5m+5^2)=\\=m^2+10m+25-m^2+10m-25=20m.$