Answer:
B)
Step-by-step explanation:
225x^2 - 1=
(15x)^2 - 1^2=(*)
(15x-1)(15x+1)
A^2 - B^2 =(A-B)(A +B)............. (*)
$$$$$$$$ the anwser is 4 i think thats how you solve it
Answer:3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93
You gotta count I did this quick
