Toán Lớp 7: (x-2)^2=(x-2)^4
Em đg cần gấp ạ !!
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 7: (x-2)^2=(x-2)^4
Em đg cần gấp ạ !!
Comments ( 2 )
(x-2)^4-(x-2)^2=0
(x-2)^2.(x-2)^2-(x-2)^2. 1=0
(x-2)^2[(x-2)^2-1]=0
=>\(\left[ \begin{array}{l}(x-2)^2=0\\(x-2)^2-1=0\end{array} \right.\)
=>\(\left[ \begin{array}{l}(x-2)^2=0\\(x-2)^2=1\end{array} \right.\)
=>\(\left[ \begin{array}{l}|x-2|=0\\|x-2|=1\end{array} \right.\)
=>\(\left[ \begin{array}{l}x-2=0\\x-2=1\\x-2=-1\end{array}\right.\)
=>\(\left[ \begin{array}{l}x=2\\x=3\\x=1\end{array}\right.\)
Vậy x in{1;2;3}
(x-2)^2=[(x-2)^2]^2
[(x-2)^4]^2 = (x-2)^8