Question

|| 2x + 1 |-5|= 12, xε Ζ.
|-inseamna modul ​

Answer 1

$| |2x + 1| - 5 | = 12 \\ |2x + 1| - 5 = 12 \\ |2x + 1| = 12 + 5 \\ |2x + 1| = 17$

I.

$2x + 1 = 17 \\ 2x = 17 - 1 \\ 2x = 16 \\ x = \frac{16}{2} \\ x = 8$

II.

$2x + 1 = - 17 \\ 2x = - 1 - 17 \\ 2x = - 18 \\ x = \frac{ - 18}{2} \\ x = - 9$

Answer 2

Răspuns:

-9 , 8

Explicație pas cu pas: