I think the answer is -4x^-11x+13
The probabilities of knocking down zero, one, and two pins are

and

, respectively. The total probability of knocking down at most two is thus

, or

.
If you mean (3n-2m)^2 then the answer is
9n^2-12mn+4m^2
So B
Answer:
do 13+7 you will have your answer. (go down for answer)
Step-by-step explanation:
its 20