(12+3x)^2=1a96
=>(12+3x)^2=1296=36^2
=>12+3x=36=-36
=>3x=24=-48
=>x=8=-16
nhận đúng nha
(12+3x)^2=1a96
=> (12+3x)^2=1a96
(12+3x)^2=36^2
=>(12+3x)=36
=>12+3x=36 => 3x=24 => x=8
=>12+3x=-36 => 3x=-48 =>x=-16
Nhớ cho mk nhé, các bạn!!!
( 12+3x ) ^2 =1a96
=> ( 12+3x ) ^2=1296=36^2
=>12+3x=36=-36
=>3x=24=-48
=>x=8=-16