Using the information from steps 1 and 2 can you walk me through step 3 and 4. Thank you! (Step 3:Simplify (2x^2+4xy+2y^2) to determine the right side of the identity. show all work for the algebraic proof.)

The john nash mall used 17,4000 kilowatt hours in may, with a peak load of 92 kilowatts. the demand charge is $5.95 per kilowatt, and the energy charge is $0.08 per kilowatt hour. the fuel adjustment charge is $0.017 per kilowatt hour. what is the total electricity cost for may?