Предмет: Математика, автор: amartsumoffborya

Решите неравенство (x+2)<2+x<28 и отметьте номер рисунка, соответствующего ответу.

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Ответы

Автор ответа: Аноним

6

(х+2)²+х≤28

х²+4х+4+х≤28

х²+5х-24≤0

х²+5х-24=0

х1+х2=-5; х1*х2=-24; х1=-8; х2=3

парабола ветвями вверх, пересекает ОХ в точках -8 и 3

парабола под осью х между этими точками (≤0)

ответ №3. (по условию на фото).

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