Wednesday, October 22, 2008

Wednesday, October 22nd, 2008

Block A Geometry PSP: p. 314-319 21-23 all, 39-47 odd

Block B Elementary Functions PSP: Easy homework (hopefully) p234 21-26 all Easy quiz tomorrow, and another quiz Friday.

Someone (being that I don't have permission and it is technically illegal for me to mention one of your names online, I cannot say whom, but it is not important other than for being credited for being observant) pointed out I made the mistake of saying that

(a+b)*(a-b) = a^2 + b^2 in class. I was applying the complex case to real numbers which does not work. I should have put:

(a+b)*(a-b) = a^2 - b^2 for real numbers.

It is sill correct that (a+bi)*(a-bi) = a^2 + b^2 for imaginary numbers.



The specific case was (10c + 2d)*(10c - 2d) = 100c^2 - 4d^2



Block C Geometry PSP:p. 314-319 21-23 all, 39-47 odd

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