Factorise the following:
1 - a - b + ab
30 Likes
= 1(1 - a) - b(1 - a)
= (1 - a)(1 - b).
Hence, 1 - a - b + ab = (1 - a)(1 - b).
Answered By
17 Likes
5px - 8qy + 4qx - 10py
9a2y - 9ay + 6a - 6
a(a - 2b - c) + 2bc
x2 + xy(1 + y) + y3