(2x+1)^2=25
(2x+1)^2=5^2
2x+1 =5
2x =5-1
2x =4
x=4:2
x=2
Vậy x=2
chuc bn hoc gioi!
nhae$
hihi
( 2x + 1 )2 = 25
( 2x + 1 )2 = 52
=> 2x + 1 = 5
=> 2x = 5 - 1
=> 2x = 4
=>x = 4 : 2
=> x = 2
(2x+1)2=25
ta có:(2x+1)2=52
(2x+1) =5
2x =5-1
2x =4
x =4:2
x =2
=> x sẽ bằng 2