Предмет: Алгебра, автор: shtankevichsashka450

5. Сократите дробь: x²-8x-9/х-9​

Ответы

Автор ответа: tisenkoelena588
0

(x=-8x-9)/(x-9)=(x+1)(х-9)/(x-9)=x+1

x²-8x-9=(x+1)(х-9) D=64+36=100;

х1=(8-10)/2=1; x2=(8+10)/2=9

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