Question

If x2 + 4 = 0, then the value of x is
+22i
+2i
O
0
-2i
Other:​

Answer 1

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${x}^{2} + 4 = 0$

Or,

${x}^{2} = - 4$

Or,

$x = \sqrt{ - 4}$

Or,

$x = \pm2i$

Where,

$i = \sqrt{ - 1}$

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Roots:-

$x = 2i$

$x = - 2i$

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Answer 2

★ Given:

• x^2 + 4 = 0

★ To Find:

• Value of x

★ Solution:

x^2 + 4 = 0

=> x^2 = -4

=> x = ±2√(-1)

=> x = ±2×√-1

We know that, √(-1) = i

so, x = ±2i