Question

упростите выражение 3a^2 (b-2c^2+5)-5 (3a^2b-4)+6c (a^2c+2)-(4b+12c)

Answer 1

3a^2 (b-2c^2+5)-5 (3a^2b-4)+6c (a^2c+2)-(4b+12c)=3а^2b-6a^2c^2+15a^2-15a^2b+20+6a^2c^2+12-4b-12c=-12a^b+15a^2+32-4b-12c