Question 1191599
<br>
You have lots of choices of how to write the two given numbers 880 and 920 in expanded form.<br>
Using multiplication patterns from algebra, surely the simplest way is<br>
{{{(900-20)(900+20) = 810000-400 = 809600}}}<br>
You of course could also do<br>
{{{(800+80)(900+20) = 720000+16000+72000+1600}}} = ...<br>
but that is clearly a lot more work.<br>