Can someone explain this better then my teacher?

Which of the following is the result of expanding

Write the expression as a single natural logarithm. 2 in a - 4 in y

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)