Question
Use suitable identities to find the following products:
(x + 8)(x - 10)
Solution
x + 8)(x - 10)
(x + 8)(x - 10) = (x + 8){x + (- 10)}
= x2 + {8 + (- 10)}x + (8)(- 10)
| Using Identity IV
= x2 - 2x - 80.
