Предмет: Алгебра, автор: Islamorueie

Решите пж уравнение 7x кводрате-9x+2=0

Ответы

Автор ответа: kpas

0

7x^2 - 9x +2 = 0
D= 81 - 4 * 7 * 2 =81-56 = 25
x1 = ( 9- 5) / 14 = 4/14 = 2/7
x2 = ( 9+5) / 14 = 1

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