7/27/2019 (92451309) hero

1/5

7/27/2019 (92451309) hero

2/5

7/27/2019 (92451309) hero

3/5

http://www.karlscalculus.org/notes.html#diffofsquareshttp://www.karlscalculus.org/notes.html#diffofsquares

7/27/2019 (92451309) hero

4/5

7/27/2019 (92451309) hero

5/5