solo pongan los numeros que faltan (es facil )
1) ( m + n ) ( m + p ) = m2 + m ( n + p ) + ______


2) ( x + y ) ( x + z ) = ______ + x ( x + z ) + ______


3) ( 2 a + b ) ( 2 a + c ) = 4 a2 + 2 a ( ______ + ______ ) + bc


4) ( r + p ) ( r - q ) = ______ + r ( ______ + ______ ) - pq


5) ( 3 d -4 e ) ( 3d - 5 f ) = 9 d2 + 3 d ( - 4 e - 5 f ) + ( ______ )


6) ( 4 g -2 h ) ( 4 g + 3 j ) = ________ + ________ - 6 hj