Answer:
Step-by-step explanation:
Divide the equation by 3, subtract 9, take the square root.
3x^2 + 27 = 0
x^2 + 9 = 0 . . . . . divide by 3
x^2 = -9 . . . . . . . . subtract 9
x = ±√(-9) . . . . . . take the square root
x = ±3i . . . . . . . . . use imaginary numbers to express the root
