Which of these represents a quadratic polynomial with exactly two zeros given by - 21 and 2i?
2 answers:
Answer:
B. x² + 4
Step-by-step explanation:
(0+/-√-16)2
+/- 4i / 2
+/- 2i
Answer:
B
Step-by-step explanation:
(x + 2i)(x - 2i)
= x² - 2ix + 2ix - (2i)²
= x² - 4i²
= x² -4(-1)
= x² + 4
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Answer:
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Step-by-step explanation:
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