Question

(X+y)(x+2y)(x+3y) даю 15 балов
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Answer 1

Ответ:

(х+y)(x+2y)(x+3y)=(х²+3ху+2у²)(х+3у)=х³+6х²у+11ху²+6у³

Answer 2

Ответ:

(x²+2xy+xy+2y²)×(x+3y)=x³+3x²y+2x²y+6xy²+x²y+3xy²+2xy²+6y²=x³+6x²y+11xy²+6y²