The problem shown in the image is:

$(4x - y)^2$

This is a binomial square, and it can be expanded using the formula for the square of a binomial:

$(a - b)^2 = a^2 - 2ab + b^2$

Here, $a = 4x$ and $b = y$. Applying the formula:

$(4x - y)^2 = (4x)^2 - 2(4x)(y) + y^2$

Now, simplify each term:

1. $(4x)^2 = 16x^2$
2. $-2(4x)(y) = -8xy$
3. $y^2 = y^2$

So, the expanded form is:

$16x^2 - 8xy + y^2$

Would you like more details on how this was derived, or do you have any further questions?

Here are five related questions for practice:

1. Expand and simplify $(5a - 2b)^2$.
2. Expand and simplify $(3x + 2)^2$.
3. What is the result of $(6x - 3)^2$?
4. Expand $(2x - y)^2$ and explain each step.
5. What happens when you square a sum, such as $(x + 3)^2$?

Tip: When squaring binomials, always use the binomial square formula to quickly expand and simplify.