1. Square of a Binomial Symbols/Pattern:
(+b) = 2 + 2 b + B²
( - b) ² = =-2 b +62
In the pattern, if is the first term and b is the last term, then the square
of a binomial consists of:
a) the square of the first term):
b) twice the product of the first and last terms (2b): and
c) the square of the last term (b).
2. The product of the sum and difference of two terms

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave