Respuesta :

Answer:

x = -4 ±√23.

Step-by-step explanation:

x^2 + 8x = 7

(x + 4)^2 - 16 = 7

(x + 4)^2 = 23

x + 4 = ±√23

x = -4 ±√23.

234483279c20

Answer: The correct answer is C.

Step-by-step explanation:

⇒[tex]x^{2} +8x+16[/tex]

⇒ which is also, [tex](X+4x^{2} ) = 23[/tex]

⇒ So, [tex]x + 4[/tex] is a square root of 23.

⇒ Then, it could be positive or negative one:

So that's why the answer would be C.

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