Question: what the two practical forms of wheatstone bridge

title: Wheatstone bridge
text: V G = ( R 2 R 1 + R 2 − R x R x + R 3 ) V s ( \ displaystyle V_ ( G ) = \ left ( ( R_ ( 2 ) \ over ( R_ ( 1 ) + R_ ( 2 ) ) ) - ( R_ ( x ) \ over ( R_ ( x ) + R_ ( 3 ) ) ) \ right ) V_ ( s ) )