What is 3x3 – 8x2 – 5x + 6 subtracted from x3 + 3x2 + 5x + 6?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18

Show all work to identify the discontinuity and zero of the function f of x equals 6 x over quantity x squared minus 36