Answer:
Step-by-step explanation:

From the initial condition,

So we have that 
FOIL first outer inner last it’s distribution
Answer:
4n^2-20n+25
Step-by-step explanation:
(-2n+5)^2
=4n^2-20n+25
What on gods name earth are you doing
Answer:
1/20
Step-by-step explanation:
probability of numbers =1/20
there are 20 numbers in the deck so each card represents 1/20.