Can somebody please help me with this??
I would really appreciate it!
(will give brainliest)

a

Step-by-step explanation:

plug in each x and y to the functions, it only works for a

yes the total will be same because in both of them the expression.is rearranged but their sign remains the same hence it hss just been shuffled

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."