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Home > CCA2 > Chapter 8 > Lesson 8.3.3 > Problem 8-172

8-172.
  1. Decide which of the following equations have real roots, and which have complex roots without completely solving them. Homework Help ✎

    1. y = x2 − 6

    2. y = x2 + 6

    3. y = x2 − 2x + 10

    4. y = x2 − 2x − 10

    5. y = (x − 3)2 − 4

    6. y = (x − 3)2 + 4

Think about the graph of each given function. Are there any x-intercepts?

real

complex

complex

real

real

complex