Tìm x: (x - 5)^2 = (x + 1) . (x - 2)

A, (x-5)^2 = (x+1) . ( x -2 ) 
B, (x+3)^2 = ( x-1) . ( x+4) 
C,  ( 2x + 3)^2 = (4x+1 . ( x-2)