運算式 3: "g" left parenthesis, "x" , right parenthesis equals log Subscript, 2 , Baseline left parenthesis, "x" squared minus 3 "x" plus "b" , right parenthesisgx=log2x2−3x+b
3
運算式 4: "h" left parenthesis, "x" , right parenthesis equals "x" squared minus 3 "x" plus "b"hx=x2−3x+b