Question

Упростите выражение:
(m-4)2 — (3-m)2

Answer 1

(m-4)²-(3-m)²=(m-4+3-m)(m-4-3+m)=-(2m-7)=7-2m

(m-4)²-(3-m)²=m²-8m+16-9+6m-m²=7-2m