Expression 5: "z" equals StartFraction, "q" Subscript, 1 , Baseline Over StartRoot, "x" squared plus "y" squared , EndRoot , EndFraction plus StartFraction, "q" Subscript, 2 , Baseline Over StartRoot, left parenthesis, "d" minus "x" , right parenthesis squared plus "y" squared , EndRoot , EndFractionz=q1x2+y2+q2d−x2+y2
5
Expression 6: StartFraction, "q" Subscript, 1 , Baseline Over StartRoot, "x" squared plus "y" squared , EndRoot , EndFraction plus StartFraction, "q" Subscript, 2 , Baseline Over StartRoot, left parenthesis, "d" minus "x" , right parenthesis squared plus "y" squared , EndRoot , EndFraction equals "V" left brace, "z" equals "V" , right braceq1x2+y2+q2d−x2+y2=Vz=V
