[( x - 3 )^2 +7 ] . 2 = 14
(x-3)^2+7=14:2
(x-3)^2+7=7
(x-3)^2=7-7
(x-3)^2=0
(x-3)^2=0^2
x-3=0
x=0+3
x=3
nhanh các bn mik cần gấp
[( x - 3 )^2 +7 ] . 2 = 14
[( x - 3 )^2 +7 ]=14:2
( x - 3 )^2 +7 =7
( x - 3 )^2=7-7
( x - 3 )^2=0
( x - 3 )^2=0^2
x - 3=0
x=0+3
x=3