Maths-
General
Easy
Question
Use polynomial identities to multiply the expressions ? (x - 9)(x - 9)
Hint:
, where x and a can be real values, variables or multiples of both. We are asked to use identities to multiply the given expression.
The correct answer is: = x2 - 18x + 81
Step 1 of 2:
The given expression is 
. It can be written as: 
. It is of the form 
.
Step 2 of 2:
Apply the identity to get the product of the expression:
We use identities to speed up the process of multiplication and simplification. There are some basic polynomial identities that you need to by heart.
