Practice problem
The vertex of y=x2+6x+18y=x^2+6x+18y=x2+6x+18 is (x1,y1)(x_1,y_1)(x1,y1). Compute x1+y1x_1 + y_1x1+y1.
−6-6−6
666
−9-9−9
999
Type a concept, like “slope” or “photosynthesis”.
