Direction: Identify the missing expression.

1. (x + 2) (x + 5) = x2 + ____ + 2x + 10
= x2 + 7x + 10

2. (2a + 4) (a – 6) = 2a2 - 12a + 4a – 24
= 2a2 - ____ - 24

3. (b – 8a) (b – 2a) = b2 – 2ab – 8ab + ____
= b2 - _____ + ____

4. (c + 10)2 = c2 + ____ + 100

5. (xy – 5)2 = ____ - 10xy + ____