Explain why the rows of pascal’s triangle are symmetric. that is, explain why c(n, k) = c(n, (n − k))

The rows of Pascal’s triangle are symmetric.

Step-by-step explanation:

Each row of Pascal's triangle is symmetric.

Clearly

nCr=nCn-r

since choosing r objects from n objects leaves n−r objects, and choosing n−r objects leaves r objects. This means that the coefficient of in the expansion of is the same as the coefficient of .

i think the answer is b x = 1, y = 35/2