Question 64015
<pre><font size = 4>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
<font size = 6><b> 
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</pre>