Expression 1: "f" left parenthesis, "x" , right parenthesis equals left parenthesis, StartFraction, left parenthesis, "x" times 1.5 , right parenthesis Over left parenthesis, "x" plus 708 , right parenthesis , EndFraction minus 1 , right parenthesis times 0.2 5fx=x·1.5x+708−1·0.25