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
