7. The sign of -10 tells you the signs of the roots are different, leaving only B and C as viable choices. It is easiest to evaluate the quadratic using the integer root. When we use -2, we find the equation is satisfied.
B is the appropriate selection.
_____ 8. The vertex form will be .. y = a(x +1)² -10 . . . . . matching selections F and H When we substitute x=1, we get 4a-10 = 2; a=3
