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October 20, 2014

October 20, 2014

Posted by **Anonymous** on Friday, March 5, 2010 at 9:29pm.

a. 45

b. 77

c. 112

- 9th grade -
**drwls**, Friday, March 5, 2010 at 10:06pma) 45 = 15 x 3 = (9+6)(9-6) = 81 - 36

= 9^2 - 6^2

b) 77 = 11 x 7 = (9 + 2) (9 - 2)

= 9^2 - 2^2

c) Your turn

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