CPM Homework Help : INT3 Problem 8-145

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Home > INT3 > Chapter 8 > Lesson 8.3.4 > Problem 8-145

8-145.

Without completely solving them, decide which of the following functions have real zeros, and which have complex zeros.

Hint:

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

$y = x^{2} - 6$
Answer (a):
real

$y = x^{2} + 6$
Answer (b):
complex

$y = x^{2} - 2x + 10$
Answer (c):
complex

$y = x^{2} - 2x - 10$
Answer (d):
real

$y = \left(x - 3\right)^{2} - 4$
Answer (e):
real

$y = \left(x - 3\right)^{2} + 4$
Answer (f):
complex

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