Упростите (x-3y)(x+3y)(x²+9y²)

Question

Упростите (x-3y)(x+3y)(x²+9y²)

Answer 1

(х-3у)(х+3у)(x+3y)(x-3y)=1
те выражения сокращаются

Answer 2

(x-3y)(x+3y)(x²+9y²)= (х²-9у²)(х²+9у²)=х⁴-9у⁴