Question

упростите выражения.

(m-4)"в квадрате"-(3-m)"в квадрате"

6a-(4a-3)"в квадрате"

Answer 1

$(m-4)^2-(3-m)^2=(m-4-3+m)(m-4+3-m)=(2m-7)(-1)=7-2m$
$6a-(4a-3)^2=6a-16a^2+24a-9=30a-16a^2-9$

Answer 2

m^2- 8m +16 -(9-6m+m^2)= m^2-8m+16-9+6m-m^2= -2m+5