Using the discriminant: Solutions to quadratic equations Understand how different values of the discriminant in the quadratic formula determine the number of real roots and whether they are irrational. Based on TEKS Algebra I standard 8a and high school Common Core standard, grade 9 11 Questions by Math_by_Kahoot 01/16/2018 answers Play N/A plays Which expression is the discriminant of the equation ax² + bx + c = 0? b − 4ac −b + 4ac b² − 4ac b² + 4ac What is the value of the discriminant in 3x² + 4x − 8 = 0? −80 80 96 112 What does the discriminant of x² − 3x + 5 = 0 tell you about the roots of the equation? The roots are non-real numbers. There are two rational roots. There are two irrational roots. There is a double root. and 8 more awesome questions! Check them out by clicking “Play”.