Plz help ASAP Will give brain and 100 points!!!! Is the equation x(x-6)=-5 a quadratic equation? 1. The equation is an quadratic equation because there is an x^2-term 2. The equation is not quadratic equation because the expression is not equal to zero. 3. The equation is not an quadratic equation because there is a term with degree higher than two. 4. The equation is not a quadratic equation because there is no x^2-term.