Toán Lớp 9: Tìm x,biết:
√(2x-1)^2 -1=2
GIÚP MIK NHA
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 9: Tìm x,biết:
√(2x-1)^2 -1=2
GIÚP MIK NHA
Comments ( 2 )
${⇔|2x-1|-1=2}$
${⇔|2x-1|=3}$
${⇔\left[\begin{matrix} 2x-1=3\\ 2x-1=-3\end{matrix}\right.}$
${⇔\left[\begin{matrix} 2x=4\\ 2x=-2\end{matrix}\right.}$
${⇔\left[\begin{matrix} x=2\\ x=-1\end{matrix}\right.}$