Question

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Answer 1

have you learned derivatives yet?

Answer 2

You don't need derivatives to find the vertex

Answer 3

ok well start by setting y equal to 0, and find the roots

Answer 4

Just use \(\large x = -\frac{b}{2a}\)

Answer 5

that works too

Answer 6

for the sake of completion, ill finish explaining out my method
once you find the roots, you find the midpoint of the roots, which will give you x
then you substitute that back into your equation to find y

Answer 7

12 +24+9