cstevenson
19.11.2019 •
Mathematics
Which equation has the solutions x=(-3+or- -/3i)/2?
a. 2x2 + 6x + 9 = 0
b. x2 + 3x + 12 = 0
c. x2 + 3x + 3 = 0
d. 2x2 + 6x + 3 = 0
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Ответ:
(x + (3 - 3i)/2)(x + (3 + 3i)/2) = 0
(2x + 3 - 3i)(2x + 3 + 3i) = 0
4x^2 + 6x + 6ix + 6x + 9 + 9i - 6ix - 9i + 9 = 0
4x^2 + 12x + 18 = 0
2x^2 + 6x + 9 = 0
Option A is the correct answer.
Ответ: