Предмет: Алгебра, автор: Pfffff1

Срочно! Помогите пожалуйста!№1060

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Автор ответа: pyfybzcjm
0
1) подставляем координаты х и у в уравнение. Получим систему:
2=3k+b
4=-k+b
Выражаем b из второго:
b=-k-4
Подставляем значение b в первое уравнение:
2=3k+(-k-4)
Выражаем k:
2=3k-k-4 => 2=2k-4 =>2k=6 =>k=3
Подставляем значение k в значение b (b=-k-4). Получим:
b=-7
Отсюда уравнение прямой: y=3x-7
Аналогично под цифрой 2)

Автор ответа: pyfybzcjm
0
оу, там b=4+k получается в итоге к=1....b=5..и уравнение прямой будет у=х+5
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