1). If the discriminant of a quadratic equation is 28 describe the roots A. 1 rational rootB. 2 rational roots C. 2 irrational roots D. 2 complex roots2). Describe the roots of 5x^2 -2x+1=0A. 1 rational rootB. 2 rational roots C. 2 irrational roots D. 2 complex roots3. What is the solution set for 3x^2 +9=5-4x?4. What is the solution set for x^2-6x-5=0