Square of 2011-2009 times 2013 Calculate by integral multiplication formula.
2011²-2009×2013
=2011²-(2011-2)×(2011+2)
=2011²-(2011²-4)
=4
What is the square of 2011 minus the square of 2009?
The square of 2011 minus the square of 2009
=(2011+2009)(2011-2009)
=4020 X 2
=8X1005
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The square of 2011 minus the square of 2009
=(2011+2009)(2011-2009)
=4020 X 2
=8X1005
If you have any questions you can ask,
Also send and click my avatar to ask me for help, please understand,