Toán Lớp 6: Tìm x :
( x + 3 )^2 = ( x + 3 )^5
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 6: Tìm x :
( x + 3 )^2 = ( x + 3 )^5
Comments ( 2 )
=>(x+3)^2-(x+3)^5=0
=>(x+3)^2 . 1-(x+3)^2 . (x+3)^3=0
=>(x+3)^2 .[1-(x+3)^3]=0
=>[((x+3)^2=0),(1-(x+3)^3=0):}
=>[(x+3=0),((x+3)^3=1-0=1):}
=>[(x=0-3=-3),(x+3=1):}
=>[(x=-3),(x=-2):}
Vậy x\in{-3;-2}