Tìm x, biết
Tìm x biết :
a) 3( x + 5 ) + 6x = -12
b) x ( 3 - 2x ) + 2 ( x^2 - 12 ) = 0
c) ( x - 1 )^2 = 9
d) ( 2x - 1)^2 + (2 - 3x)^2 - 2( 2x - 1 )( 2 - 3x ) = 0
a) 3( x + 5 ) + 6x = -12
b) x ( 3 - 2x ) + 2 ( x^2 - 12 ) = 0
c) ( x - 1 )^2 = 9
d) ( 2x - 1)^2 + (2 - 3x)^2 - 2( 2x - 1 )( 2 - 3x ) = 0