x^5y^2-x^3-3xy+3
=x³(x²y²-1)-3(xy-1)
=x³(xy+1)(xy-1)-3(xy-1)
=(xy-1)[x³(xy+1)-3]
=(xy-1)(x^4y+x³-3)不客气，如果对你有帮助，请采纳！