2xy-5x-5y=0如何变形为(2x-5)(2y-5)=25_数学解答

2xy-5x-5y=0如何变形为(2x-5)(2y-5)=25

人气：339 ℃　时间：2020-05-23 01:43:42

解答

(2XY-5X-5Y)*2=O
4XY-10X-10Y=0
(4XY-10X-10Y)+25=0+25
(4XY-10Y)-10X+25=25
(4XY-10Y)-(10X-25)=25
2Y(2X-5)-5(2X-5)=25
(2X-5)(2Y-5)=25