Предмет: Алгебра, автор: Ромашка851

Решить уравнение:
1) 5(8x − 1) − 7(4x + 1) + 8(7 − 4x) = 9.
2) 6 = − x^2 − 7x.
3) (x-5) (x+3)=9

Ответы

Автор ответа: Angel7832
0
1) 40х-5-28х-7+56-32х=9 40х-28х-32х=5+7-56+9 -20х=-35 х=-35/-20 х=1,75
Автор ответа: Ваня6120
0
РРРРРЕЕЕЕЕЕШШШШШЕЕЕЕЕННННООО :)
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