Archive
15th of March 2017
Mathematics
Q:

Factorise: a(a-1)-b(b-1)

Nisha_vini29 - CBSE - Class IX

Wednesday, March 15, 2017 at 17:49:PM

A:

a(a - 1) - b(b -1)

= a2 - a - b2 + b

= a2 - b+ b - a

= (a - b)(a + b) - (a - b)

(a - b) (a + b - 1)


Wednesday, March 15, 2017 at 17:54:PM