SOLUTION: I need to simplify 6.7x(3x-2y)+1.2(x^2-y^2) Heres what I have completed 20.1x^2-13.4xy+1.2x^2-1.2y^2 = 21.3x^2-1.2y^2-13.4xy

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Question 64015: I need to simplify 6.7x(3x-2y)+1.2(x^2-y^2)
Heres what I have completed 20.1x^2-13.4xy+1.2x^2-1.2y^2 = 21.3x^2-1.2y^2-13.4xy
Answer by Edwin McCravy(20086)   (Show Source): You can put this solution on YOUR website!
I need to simplify 

6.7x(3x - 2y) + 1.2(x² - y²)

Heres what I have completed  

20.1x² - 13.4xy + 1.2x² - 1.2y² =

21.3x² - 1.2y² - 13.4xy
 
You are correct! However your
teacher may have expected you
to write the final answer in
descending powers of x, in which
case you would swap the last two
terms and write:

21.3x² - 13.4xy - 1.2y²

Edwin