Question

упростите выражение
(m+3) во 2 степени - (m-2)(m+2)

Answer 1

$(m+3)^2-(m-2)(m+2)=m^2+2*m*3+3^2-(m^2-2^2)= \ \ =m^2+6m+9-m^2+4=6m+13$

Answer 2

(m+3)2 - (m-2)(m+2) = m2+6m+9-(m2-4) = m2+6m+9-m2+4 = 6m +13
вроде