document.write( "Question 1200167: I know the chosen topic has nothing to do with this but I couldn’t find the topic for this problem.\r
\n" ); document.write( "\n" ); document.write( "Use polynomial identities and number properties to perform the calculation.
\n" ); document.write( "109^2 \n" ); document.write( "

Algebra.Com's Answer #834228 by ikleyn(52790) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "I know the chosen topic has nothing to do with this but I couldn’t find the topic for this problem.\r
\n" ); document.write( "\n" ); document.write( "Use polynomial identities and number properties to perform the calculation $\"highlight%28mentally_without_using_a_calculator%29\"$ .
\n" ); document.write( "109^2
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document.write( "Use   =  =  -  +  = 12100 - 220 + 1 = 11880 + 1 = 11900 - 20 + 1 = 11880 + 1 = 11881.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "This way.\r
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\n" ); document.write( "\n" ); document.write( "May I ask you please do not include in your future posts this very first line about the topic.\r
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\n" ); document.write( "\n" ); document.write( "It does not carry any useful info, and we, the tutors at this forum, never look at the \" topic \".\r
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\n" ); document.write( "\n" ); document.write( "It's a pity to spend time reading unnecessary information.\r
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\n" ); document.write( "\n" ); document.write( "Simply say \" could you help me please \" - it is just enough. Necessary and enough.\r
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\n" ); document.write( "\n" ); document.write( "Also necessary to post your \"thanks\" after receiving a tutor's response.\r
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\n" ); document.write( "\n" ); document.write( "It is much more important than posting many words that mean nothing.\r
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