A. X² + 10x + 25 = 0
B. X² + 5x + 6 = 0
C. X² + 4x - 12 = 0
Cra menjawabny ada di lmpirn
![](https://id-static.z-dn.net/files/d21/5f12a53ed29f216d93532a4509f9178a.jpg)
--
[tex] \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
Nomor A :
[tex] {x}^{2} + 10x + 25 = 0[/tex]
[tex]x = \frac{ - 10 + \sqrt{ {10}^{4} } - 4.1.25 }{2.1} [/tex]
[tex]x = \frac{ - 10 + \sqrt{100 - 4.1.25} }{2.1} [/tex]
[tex]x = \frac{ - 10 + \sqrt{100 - 100} }{2.1} [/tex]
[tex]x = \frac{ - 10 + \sqrt{0} }{2.1} [/tex]
[tex]x = \frac{ - 10 + 0}{2.1} [/tex]
[tex]x = \frac{ - 10}{2.1} [/tex]
[tex]x = \frac{ - 10}{2} [/tex]
[tex] \bf \red {x = - 5} \\[/tex]
--
Nomor B :
[tex] {x}^{2} + 5x + 6 = 0[/tex]
[tex]x = \frac{ - 5 + \sqrt{ {5}^{2} - 4.1.6} }{2.1} [/tex]
[tex]x = \frac{ - 5 + 1}{2} [/tex]
[tex]x = \frac{ - 5 - 1}{2} [/tex]
[tex]x = - 2[/tex]
[tex] \bf \red {x = - 3} \\[/tex]
--
Nomor C :
[tex] {x}^{2} + 4x - 12 = 0[/tex]
[tex]x = \frac{ - 4 + \sqrt{ {4}^{2} } - 4.1( - 12)}{2.1} [/tex]
[tex]x = \frac{ - 4 + 8}{2} [/tex]
[tex]x = \frac{ - 4 - 8}{2} [/tex]
[tex]x = 2[/tex]
[tex] \bf \red{x = - 6} \\[/tex]
[tex] \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]