Respuesta :

tuleenaghabi

Answer:

x=0,4

Step-by-step explanation:

use (b/2)^2

b=−4 , (−4/2)^2=4

add 4 to both sides:

x^2  - 4x + 4 = 4

factor:

(x-2)^2= 4

Square root both sides:

x−2 = ± 2

x= 2 ± 2

x=0

x=4

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