Решить уравнения : ) а) 18-х2=14 б)х2+3=3-х в)х2+2=х+2 г)5х+2=2-2х(2)
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19.05.2019 03:10
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1
а) -х2=14-18
х2=4
х=2
х=-2
Б)
(х-3)(х+3)=(3-х)
х+3=0
х=-3 по моему
в) (х+2)(х-2)=(х+2)
х-2=0
х=2
а) 18-х2=14
-х2=14-18
-х2= -4 | умножаем на (-1)
х2=4
х=2
ответ: 2