Toán Lớp 10: Phương trình |6+2x| = 3 có nghiệm là
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 10: Phương trình |6+2x| = 3 có nghiệm là
Comments ( 2 )
|6+2x|=3$\\$<=>\(\left[ \begin{array}{l}6+2x=3\\6+2x=-3\end{array} \right.\) $\\$<=>\(\left[ \begin{array}{l}x=\frac{-3}{2}\\x=\frac{-9}{2}\end{array} \right.\)
Vậy S={-3/2;-9/2}
|6+2x|=3
⇔ $\left[\begin{matrix} 6+2x=3\\ 6+2x=-3\end{matrix}\right.$
⇔ $\left[\begin{matrix} 2x=-3\\ 2x=-9\end{matrix}\right.$
⇔ $\left[\begin{matrix} x=\dfrac{-3}{2}\\ x=\dfrac{-9}{2}\end{matrix}\right.$
Vậy x∈{-3/2; -9/2}