4 × ([tex]\displaystyle{x}[/tex] + 1) × (3[tex]\displaystyle{x}[/tex] + 7) = 0
(4[tex]\displaystyle{x}[/tex] + 4) × (3[tex]\displaystyle{x}[/tex] + 7) = 0
Cazul 1:
4[tex]\displaystyle{x}[/tex] + 4 = 0
4[tex]\displaystyle{x}[/tex] = -4
[tex]\displaystyle{x}[/tex] = (-4) : 4
[tex]\boxed{x=-1}[/tex]
Cazul 2:
3[tex]\displaystyle{x}[/tex] + 7 = 0
3[tex]\displaystyle{x}[/tex] = -7
[tex]\displaystyle{x=\frac{7}{3}}[/tex]
-2 × ([tex]\displaystyle{x}[/tex] - 15) = 0
-2[tex]\displaystyle{x}[/tex] + 30 = 0
-2[tex]\displaystyle{x}[/tex] = -30
2[tex]\displaystyle{x}[/tex] = 30
[tex]\displaystyle{x}[/tex] = 30 : 2
[tex]\boxed{x=15}[/tex]
- Lumberjack25
