PLZ HELP IMAGE BELOW IS question TY THIS IS FROM KHAN BTW TY

20 ! need which shows a difference of squares? 10y^2-4x^2 16y^2-x^2 8x^2-40x+25 64x^2-48x+9

What function has a range {yly< 5}? question on picture above^

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?