Question

Упростите выражение a^3-(a+1)^3+3a^2

Answer 1

a^3-(a+1)^3+3a^2=a^3-(a^3+3a^2+3a+1+3a^2=a^3-a^3-3a^2-3a-1+3a^2=-(3a+1)

Answer 2

а³-(а³+3а²+3а+1)+3а²=а³-а³-3а²-3а-1+3а²=-3а-1