Question 22907
1a. axis of symmetry x=-5
1b  the -3 tells you the opening is down

2. y-3 =2(x^2+6x)
   y-3+18 =2(x^2+6x+9)
   y+15 =2(x+3)^2
   y = 2(x+3)^2-15

3. Your posting is garbled.

Cheers,
Stan H.