Respuesta :

Answer:

there are 2 solutions in total

Step-by-step explanation:

x^2-4=0

x^2=4

x= ±2i

Answer:

x=±2

Step-by-step explanation:

x²-4=0

x²-2²=0

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

either x+2=0,x=-2

or x-2=0,x=2