Question

What are the solutions of x^2 - 4 = 0

Answer 1

It is a difference of squares, so we can factor this to

$(x+2)(x-2)=0$

Then, we can solve for $x$.

$x=-2,2$

Hope this helps.

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Answer 2

Answer:

x = ± 2 i

Step-by-step explanation:

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

=

±

2

i