Please Help! I'm stuck

Which is the completely factored from of xy^3-x^3y

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Given the lease terms below, what monthly lease payment can you expect on this vehicle? terms: •length of lease: 60 months •msrp of the car: $28,500 •purchase value of the car after lease: $12,900 •down payment: $1900 •lease factor: 0.0005 •security deposit: $375 •aquisition fee: $300 a.$232.50 b.$279.99 c.$227.50 d.$248.08