Предмет: Алгебра, автор: Kertyiopqwe

ПОМОГИТЕ ПОЖАЛУЙСТА С АЛГЕБРОЙ 8 КЛАСС СРОЧНО

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Автор ответа: 1alkapalka

0

1. a) -x^2-4x+5>0

x^2+x-5x+5>0

-x * ( x-1) - 5 (x -1) > 0

- (x-1) * (x+5) > 0

$\left \{ {{- (x- 1) > 0} \atop {x+5>0}} \right. \left \{ {{x < 1} \atop {x> -5}} \right. \left \{ {{- (x > 1} \atop {x < - 5}} \right.$

x = (-5 , 2)

x = ∞

x = (-5 , 1)

1alkapalka: Там где A - это не писать

1alkapalka: Это значит то что нужно отступить клетку

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