Pick a two-digit number greater than 25. Rewrite your two-digit number as a difference of two numbers. Show how to use the identity below to square your number without using a calculator. (x-y)2 =x2 -2xy+y2

My two-digit number greater than 25:

Rewrite your two-digit number as a difference of 2 numbers:


Use the identity above to square your number without using a calculator:
use the number 40