The task in Exercise 2.7A involves expressing quadratic expressions in "completed square form." Let's start by breaking down how to approach these problems step by step.

In general, completing the square involves transforming a quadratic expression of the form:

$ax^2 + bx + c$

into the completed square form:

$a(x - h)^2 + k$

where $h$ and $k$ are constants.

For Questions 1 to 12:

The task here is to rewrite the given expressions, which are already in the form of $(x + p)^2 + q$ or $(x - p)^2 + q$, back into the standard quadratic form $ax^2 + bx + c$.

Would you like me to help with specific examples, or go through how to approach some of these problems, like the more complex ones in the second part of the exercise (Questions 13 to 32)?

Feel free to let me know which question you'd like to explore in more detail!