Question

4-(2a+3b)^2

Answer 1

(-2a+2-3b)(2a+3b+2)

Answer 2

4 − ( 2a + 3b )²
( 2 )^2 − ( 2a + 3b )^2

Factorise as the difference of 2 squares = a² − b² = ( a + b )( a − b )
[ 2 + ( 2a + 3b ) ][ 2 − ( 2a + 3b ) ]
( 2 + 2a + 3b )( 2 - 2a - 3b )
( 2a + 3b + 2 )( 2 − 2a − 3b )

Hope this helps