Respuesta :

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Answer:

x = -6

Step-by-step explanation:

Solve for x over the real numbers:

2 x^2 + 24 x + 72 = 0

Divide both sides by 2:

x^2 + 12 x + 36 = 0

Write the left hand side as a square:

(x + 6)^2 = 0

Take the square root of both sides:

x + 6 = 0

Subtract 6 from both sides:

Answer:  x = -6