Question

a^2 - 25 - ab +5b
Factorise the following​

Answer 1

$a^2 - 25 - ab +5b$

$a^2 - 5^2 +b ( 5-a )$

Using ( a² - b² ) = ( a + b ) ( a - b ) ] expand above equation

= ( a + 5 ) ( a - 5 ) + b ( 5-a )

= ( a- 5 ) [ (a +5 )  - b]

= ( a- 5 ) [a +5- b]

Mark as brainliest if it helped :D