Help me find the domain of rational expression of (x²-7x+12)/5x

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?

Will mark brainliest! ( explain the answer too, it can be one sentence)