x² + 6x + 8 = 0
Gunakan Metode Rumus ABC/Kuadratik!![]()
Gunakan Metode Rumus ABC/Kuadratik!
HP dari x² + 6x + 8 = 0 adalah {-4, -2}
Pembahasan
Menggunakan rumus ABC
[tex]\begin{aligned}&{\sf{x^2+6x+8=0}}\\&{\sf{a=1,b=6,c=8}}\\&{\sf{x =\frac{-b\pm\sqrt{b^2-4ac}}{2a}}}\\&{\sf{x_{1,2}=\frac{-6\pm\sqrt{6^2-4(1)(8)}}{2(1)}}}\\&{\sf{x_{1,2}=\frac{-6\pm\sqrt{36-32}}{2}}}\\&{\sf{x_{1,2}=\frac{-6\pm\sqrt{4}}{2}}}\\&{\sf{x_{1,2}=\frac{-6\pm2}{2}}}\\&\begin{array}{c|c}\begin{aligned}{\sf{x_1=\frac{-6-2}{2}}}\end{aligned}&\begin{aligned}{\sf{x_2=\frac{-6+2}{2}}}\end{aligned}\\\begin{aligned}{\sf{x_1=\frac{-8}{2}}}\quad~~~\end{aligned}&\begin{aligned}{\sf{x_2=\frac{-4}{2}}}\quad~~~\end{aligned}\\\begin{aligned}{\sf{x_1=-4}}\qquad\end{aligned}&\begin{aligned}{\sf{x_2=-2}}\quad~~~~\end{aligned}\end{array}\end{aligned}[/tex]
[answer.2.content]
