This is correct so far. I would recommend multiplying both sides of the equation by -1 and then trying to factor the polynomial.

That is correct. Making a table of values might help.

You are correct for the first two. For the last one, an exponent of 2 means multiply the number by itself. Do you remember how to multiply two fractions? I will set it up for you:

The last section is composition of functions. So, means take the function and wherever you see an , replace it with . So, . Now, in place of , put the formula for .