Предмет: Алгебра, автор: skosarevanasta27


помогите пожалуйста

Приложения:

Ответы

Автор ответа: saduakasadil7
0

Ответ:

от первого отнимаем второе, 3ху сокращаются остается

-х+у=1

-х+у-1=0

у=1+х

подставим значение

3х(1+х)-х=5

3х+3х²-х-5=0

2х+3х²-5=0

Д=4-(4×3×(-5)=4+60=64=8²

х1/х2=-2±8/6

х1=1

х2=-10/6

есть два варианта ответа


skosarevanasta27: это надо решить методом сложения, и в ходе этого в конце должна получиться 9. Но я этого не увидела
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