Expression 2: left parenthesis, "f" left parenthesis, "x" , right parenthesis minus .5 , right parenthesis Superscript, 2 , Baseline equals 0fx−.52=0
2
Expression 3: absolute value left parenthesis, "f" left parenthesis, "x" , right parenthesis minus .5 , right parenthesis Superscript, 2 , Baseline equals 0absfx−.52=0
3
Expression 4: 1 equals "f" left parenthesis, "x" , right parenthesis1=fx