How do you solve x^2+ 4 = 0?

3 Answers
Apr 14, 2018

x=+-2i " "

Explanation:

x^2+4=0 " " subtract 4 on both sides to get

x^2 = -4 " " Take the square root of both sides to get

x=+-2i " "

Apr 14, 2018

x=+-2i

Explanation:

For this, you need a concept of imaginary numbers

x^2+4=0

rArr x^2+4-4=0-4

(Subtracting 4 from both sides)

rArr x^2=-4

rArr x=sqrt(-4)

rArr x=sqrt(-1xx4)

rArr x=+-2sqrt(-1)

(The value of sqrt(-1) is i )

rArr x=+-2i

Hope this helps :)

Apr 14, 2018

No real solution

Explanation:

x^2+4=0

Start by subtracting 4 from both sides

x^2 + 4 - 4 = 0 - 4

x^2 = -4

Now we can take square root

x = +-sqrt(-4)

Thus,

No real solutions