Question

find the root of equation x²-4=0​

Answer 1

Answer:

Explanation:

For this, you need a concept of imaginary numbers

x2+4=0

⇒x2+4−

4=0−4

(Subtracting

4

from both sides)

⇒

x

2

=

−

4

⇒

x

=

√

−

4

⇒

x

=

√

−

1

×

4

⇒x=±2√−1

(The value of √-is i)

⇒x=±2i

Hope this helps :)