Автор - assssDGsssss

ПОМОГИТЕ СРОЧНО №32,9 чотные срочнооооооооо!!!!!!!!!!!!!!!!!!!!!!!!!!

Ответ

Автор - selvik478gmailcom
2) -9c²+(3c+d)²-d² = -9c²+9c²+6cd+d²-d² = 6cd
4) (7b-t)(t+7b)+(7b+t)² = (7b-t)(7b+t)+49b²+14bt+t² = 49b²-t²+49b²+14bt+t² = 98b²+14bt
6) (11c+3)²+2c(5,5c+33) = 121c²+66c+9+11c²+66c = 132c²+132c+9

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