Question

20092008²
------------------------
20092007²+ 20092009²- 2​

Answer 1

Step-by-step explanation:

20092008^2

--------------------

20092009^2 + 20092007^2 -2

= 20092008^2

-----------------------------

(20092009 -20092007)^2 + 2(20092009)(20092007) -2

=20092008^2

---------------------------

4-2 + 2(20092009)(20092007)

= 20092008^2

--------------------------

2(1+2