Respostas

2014-03-30T18:05:38-03:00
(3x)²+ 2*(3x)*y + y²
9x² + 6xy + y²
2014-03-30T18:32:59-03:00
A operaçao e o total de
(3x+y)²=
(3x )² + 2 . (3x ) . ( y) + (y )²=
9x² +6xy + y²