Two unit vectors that are normal to the plane

[earthyearth]

Homework Statement

Find two unit vectors that are normal to the plane determined by the points A(0,-2,1), B(1,-1,-2), and C(-1,1,0)

I found the cross-product of the two position vectors then i got 8i+4j+4k then i divided that by the magnitude to get the unit vector but how do i find the other one? can i just add a coefficient in front of the unit vector?

 

[HallsofIvy]

Take the opposite direction.