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Factor x^2+64 using complex numbers
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5 votes
Factor x^2+64 using complex numbers

User Amit Goldstein
by
7.0k points

1 Answer

6 votes

Answer:

(x + 8i)(x - 8i)

Explanation:

note that

8i × - 8i = - 64i² = 64 → i² = - 1

Thus

x² + 64 = (x - 8i)(x + 8i) ← difference of squares

User Agustin Seifert
by
7.7k points
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