помогите срочно !!!!!!!!!!!!!упростите выражение :
а) (х+6) (х²- 6х + 36) - х³
б) 16х³ - 27х² + (3х+ 4)³
а) (х+6) (х²- 6х + 36) - х³
б) 16х³ - 27х² + (3х+ 4)³
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Ответ:
a) (x+6) (x^2 - 6x + 36) = x^3 + 216 - x^3 = 216
b) 16x^3 - 27x^2 + (3x +4)^3 = 16x^3 - 27x^2 + 27x^3 + 108x^2 + 144x + 64= 43x^3 + 81x^2+144x + 64