Which expression is equal to 3xx 3 x−2x? Responses 4x2 x 6x(x 3) fraction numerator 4 x squared plus x plus 6 end numerator over denominator x left parenthesis x plus 3 right parenthesis end fraction 4x2 x−6x(x 3) fraction numerator 4 x squared plus x minus 6 end numerator over denominator x left parenthesis x plus 3 right parenthesis end fraction x2 4x−6x(x 3) fraction numerator x squared plus 4 x minus 6 end numerator over denominator x left parenthesis x plus 3 right parenthesis end fraction 3x2 2x−6x(x 3)