

You have

for all

, and dividing by

gives

, or

. By the racetrack principle, then, it follows that

.
(x+5)^2 = 49;
Then x + 5 = 7 or x + 5 = -7 ;
Finally, x = 2 or x = -12.
Step-by-step explanation:
questions 8, obviously the mid part of the parabola is 3, that is the axis of symmetry.
question 9, only one solution because you only have one parabola.
Answer:
identity
Step-by-step explanation: