(x-4y)(x+3y)+(x-3y)(3y+x)

Question

(x-4y)(x+3y)+(x-3y)(3y+x)

Answer 1

(х²+3ух-4ух-12у²)+(3ху+х²-9у²-3ху)=(х²-ух-12у²)+(х²-9у²)=х²-ух-12у²+х²-9у²=2х²-ух-21у²

Comments

ответ другой !!!!

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2х²-ху-21у²

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исправила