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The quadratic formula and the discriminant — Homework
Use the discriminant and the quadratic formula.
- 1.Find the discriminant of x² + 6x + 9 = 0 and state how many real solutions it has.
- 2.Find the discriminant of x² + x + 1 = 0 and state how many real solutions.
- 3.Solve using the quadratic formula: x² - 2x - 8 = 0.
- 4.Solve using the quadratic formula: 2x² + x - 6 = 0.
- 5.Without fully solving, state how many real solutions 4x² - 4x + 1 = 0 has, and why.
- 6.Explain what a negative discriminant tells you about the graph of the parabola (does it cross the x-axis?).
🌲 Homeschool for the FutureNinth Grade · Math · week 29 homework