CPM Homework Help : CCA2 Problem 8-172

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Home > CCA2 > Chapter Ch8 > Lesson 8.3.3 > Problem 8-172

8-172.

Decide which of the following equations have real roots, and which have complex roots without completely solving them.

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

$y = (x - 3)^2 - 4$
Answer (e):
real

$y = (x - 3)^2 + 4$
Answer (f):
complex

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