9 is the blank.
(a+b)^2 = a^2 + 2ab + b^2
a = x
b = 3
(x+3)^2 = x^2 + 6x + 9
Yes they do, Hope this helps :p
Answer:

Step-by-step explanation:
1 > −1 - w
+ 1 + 1
________

Whenever you divide\multiply by a <em>negative</em>, you reverse the inequality symbol.
I am joyous to assist you anytime.
you have to read the bottom link for the answer key
Answer: Perimeter = 22*sqrt(2)
Area = 60.5 inches
Step-by-step explanation:
Simple a square has 4 equal sides.
It contains (by definition) 1 right angle but since we are not including and statement about parallel sides, it needs 4 right angles.