упростите выражения : 4в(3в+6) – 12в2 2(в+1)2 – 4в
4b·(3b+6)=4b·3b+4b·6=12b2+24b–12b2=24b 2·(b+1)2–4b=2·(b2+2b+1)–4b=2b2+4b+1–4b=2b2+1