9514 1404 393
Answer:
x = ±3√2i
Step-by-step explanation:
Add -18 to both sides of the equation:
x^2 = -18
Take the square root of both sides:
x = ±√(-18)
Remember that 18=9·2 = (3^2)·2 and √-1 = i. Simplify.
x = ±(√(3^2))·(√2)·(√-1)
