Respuesta :

Answer:

x=2

Step-by-step explanation:

[tex]x^2-4x=-4[/tex]

[tex]x^2-4x+4=-4+4[/tex] (Add 4 to both sides)

[tex]x^2-4x+4=0[/tex]

Now, we can solve it using quadratic formula

[tex]x_{1,\:2}=\cfrac{-\left(-4\right)\pm \sqrt{\left(-4\right)^2-4* \:1* \:4}}{2* \:1}[/tex]

[tex]x_{1,\:2}=\cfrac{-\left(-4\right)\pm \sqrt{0}}{2* \:1}[/tex]

[tex]x=\cfrac{-\left(-4\right)}{2* \:1}[/tex]

[tex]x=2[/tex]

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chaneldemoure

Add 4 to both sides of the equation.
x^2+4x+ 4 =0

4±√4^2−4⋅(1⋅4)
————————
2⋅1

x= -2