CPM Homework Banner

Home > CCA > Chapter 10 > Lesson 10.3.3 > Problem 10-139

10-139.
  1. Without graphing, determine if the graph of each rule below has zero, one, or two x‑intercepts. Show all work. Homework Help ✎

    1. y = 6x2 + 7x − 20

    2. y = x28x + 16

    3. y = 2x2 + x + 3

    4. y = (2x + 1)2

The graphs of these equations are all parabolas. To find the x-intercepts, let y = 0 and solve using the Quadratic Formula or factoring and the Zero Product Property.

0 = (3x − 5)(x + 4)

Two intercepts.

0 = (x − 4)2

No intercepts.