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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

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  1. Which expression is the discriminant of the equation ax² + bx + c = 0?
  2. What is the value of the discriminant in 3x² + 4x − 8 = 0?
  3. What does the discriminant of x² − 3x + 5 = 0 tell you about the roots of the equation?
  4. and 8 more awesome questions! Check them out by clicking “Play”.