99 en 39. Factorise: 1-(a-b)2SS) SERIES JSCE/BECE A. (1-a-b)(a-a+b) SERB. (1-a+b)(1+a-b) SWERC. (1-a+b)(1+a+b) (SD. (1+a+b)(1+a-b) factorize 1 - a - B opposed bracket
[tex]1 - (a - b)2[/tex]



Answer :