Предмет: Алгебра, автор: Kritik1234

Решите уравнение (-2x+1)(-2x-7)=0

Ответы

Автор ответа: zaicdnk90

1

4x^2+14x-2x-7=0
4x^2+12x-7=0
D=144+112=256
x1,2=(-12+|-16)/8=(-3+|-4)/2
x1=1/2 x2=-3,5

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