90.1k views
5 votes
What are the roots of the polynomial equation:

(x + 5)(x + 5i)(x - 5i) = 0
Enter your answers in order from least to greatest, separated by a comma.

User Mmorihiro
by
6.1k points

2 Answers

6 votes

Answer:

lol

Explanation:

User RajuGT
by
6.8k points
3 votes
Set each factor equal to 0 and solve for x

x+5 = 0 leads to x = -5
x+5i = 0 leads to x = -5i
x-5i = 0 leads to x = 5i

The three roots are: -5, -5i, 5i

Side note: it is not possible to order complex numbers in the form a+bi where 'b' is nonzero. Only purely real numbers can be ordered.
User Epsiloncool
by
7.2k points
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