Respostas

2014-02-23T11:26:43-03:00
M=x i=y
(2x-25)+(x+5)y
2x−25+(x+5)⋅y
2x−25+y(x+5)
2x−25+y⋅x+y(5)
2x−25+xy+y(5)
2x−25+xy+y⋅5
2x−25+xy+5y
xy+2x+5y−25