x²+ 1 = 0. then x = ?
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Correct Answer: Option B
Explanation:
Given the equation \( x^2 + 1 = 0 \):
1. Subtract 1 from both sides:
\[
x^2 = -1
\]
2. Take the square root of both sides:
\[
x = \pm \sqrt{-1} = \pm i
\]
So, \( x = i \) (where \( i \) is the imaginary unit).
The correct answer is:
B. i.
Given the equation \( x^2 + 1 = 0 \):
1. Subtract 1 from both sides:
\[
x^2 = -1
\]
2. Take the square root of both sides:
\[
x = \pm \sqrt{-1} = \pm i
\]
So, \( x = i \) (where \( i \) is the imaginary unit).
The correct answer is:
B. i.