Question

Factorizar

1) (x + y )(n + 1 ) - 3 (n + 1 )
2)(a + 1 )(a - 1 ) - 2 ( a - 1 )
3) (a( a + b ) - b ( a + b )
4)(2x + 3 )( 3 - r ) - (2x - 5 )( 3 - r )

Answer 1

1) (n+1) (x+y - 3)

2) (a+1) ( a-1 - 2) = (a + 1) (a - 3)

3) (a+b) (a - b)

4) (3 - r) (2x+3 - 2x + 5) = (3 - r) (8)