## Intermediate Algebra (6th Edition)

y=4±3i$\sqrt 2$
Original Equation (y-4)²+18=0 Subtract 18 from both sides (y-4)²=-18 Take the square root of both sides y-4=±$\sqrt -18$ Simplify the radical y-4=±3i$\sqrt 2$ Add 4 to both sides y=4±3i$\sqrt 2$