Expression 4: left parenthesis, "x" plus 2.7 5 , right parenthesis squared plus left parenthesis, "y" minus .5 , right parenthesis squared equals 1.5 6 2 5x+2.752+y−.52=1.5625
4
Expression 5: left parenthesis, "x" minus 2.7 5 , right parenthesis squared plus left parenthesis, "y" minus .5 , right parenthesis squared equals 1.5 6 2 5x−2.752+y−.52=1.5625