Предмет: Алгебра, автор: Аноним

Помогите, пожалуйста. СРОЧНО.
Решите уравнение:
1) 2x(3x-4)-3x(2x+5)=7
2) 8(x^2-1)-3x(x+2)=5x^2-6x-5

Ответы

Автор ответа: qwerty100
0
1) 2x(3x-4)-3x(2x+5)=7
6x^2-8x-6x^2-15x=7
-23x=7
x=-7/23
Автор ответа: qwerty100
0
счас дорешаю
Автор ответа: Аноним
0
Ок.
Автор ответа: qwerty100
0
5x^2-6x-8=5x^2-6x-5
Автор ответа: qwerty100
0
получается -3
Автор ответа: Аноним
0
Спасибо)))
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