Reduction of matrix equation

  • #1
11
0
Hello hope you can help me.

Can anybody tell me what goes on from equation 3 to 4. especially how
upload_2015-12-2_16-4-12.png
gets in?

mdsd.jpg
 

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Answers and Replies

  • #2
RUber
Homework Helper
1,687
344
Note that ##\overline{Y}(n \overline{X}^2 ) = \overline{X}(n \overline{X}\overline{Y}).## This means that from 3 to 4, there was an addition of zero...likely to make the step from 4 to 5 more clear.
 
  • #3
11
0
That right - thank you!
 

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