A+7b+12ab ,
I hope it helps you and best of wishes!!
Answer:
I found that it was -1, but everything online is telling me -36.
Draw it on a graph.
the distance between the x is |6-4| = 2
the distance between the y is |3-4| = 1
then use pythagoras a^2 + b^2 = c^2
2 squared add 1 squared = 5
root 5 is the distance.