Question

Решите уравнение:(3 – 2х) ² – (5+2х)(2х +1) = -20

Answer 1

(3-2х)² - (5+2х)(2х+1) = -20
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.