Упростите выражение: (m+4)^2-(m-3)(m+3)
(m+4)^2-(m-3)(m+3)=m^2+8m+16-m^2+9=8m+25
(m+4)^2-(m-3)(m+3) = m^2+8m+16-(m^2-9)=m^2+8m+16-m^2+9=8m+25