Предмет: Алгебра, автор: leonenveronika

Срочноооо!! Все два задания !!!

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Автор ответа: anyasolomka59

1

Ответ:

Решила только 1...

Объяснение:

4b2-(7b2-3bc)+(3b2-7bc)=4b2-7b2+3bc+3b2-7bc=-4bc,

так как b=-1,5, c=4, -4bc=-4*(-1,5)*4=4*1,5*4=6*4=24

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