(x+9)(x²-9x+81)=-6-4x+x³ ​

Question

(x+9)(x²-9x+81)=-6-4x+x³ ​

Answer 1

(x+9)(x²-9x+81)=-6-4x+x³

X³+9³ =x³-4x-6

4x=-6-9³

4x=6-729

4x=735  /  : 4

X=735/4=183,75