Решите уравнение: (3 – 2х) ² – (5+2х)(2х +1) = -20
grasdas
3
30.07.2019 06:30
1
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2
9-12х+4х² - (10х+5+4х²+2х) = -20
9-12х+4х² - 10х-5-4х²-2х = -20
-24х = -20-9+5
-24х = -24
х = -24 : (-24)
х = 1
ответ: 1.