Expression 1: "y" equals StartFraction, left parenthesis, "x" squared plus 3 "x" minus 4 , right parenthesis Over left parenthesis, "x" squared plus "x" , right parenthesis , EndFraction left brace, "y" less than 0 , right brace Has graph. To audio trace, press ALT+T.y=x2+3x−4x2+xy<0