document.write( "Question 94068: Find the value of the polynomial $\"-x%5E2%2B10x-10\"$ when x=-5
\n" ); document.write( "i want to make sure i did this correctly.
\n" ); document.write( " $\"-%28-5%5E2%29%2B10%28-5%29-10\"$
\n" ); document.write( " $\"25-50-10\"$
\n" ); document.write( "answer -35 \n" ); document.write( "

Algebra.Com's Answer #68491 by edjones(8007) $\"\"$ $\"About$

You can put this solution on YOUR website!
This illustrates a very important and often-times overlooked rule in squaring numbers.
\n" ); document.write( "-5*-5=25 but $\"-5%5E2=-25\"$ Check it out on a calculator. Make sure you don't use any brackets. It turns out $\"-5%5E3\"$ and $\"-5%5E4\"$ are negative also.
\n" ); document.write( "What's going on here?
\n" ); document.write( "Think of -5 as -1*5 and only the the 5 gets squared.
\n" ); document.write( "Use brackets if you want the result to be positive. eg. $\"%28-5%29%5E2=25\"$
\n" ); document.write( "Back to your problem:
\n" ); document.write( " $\"-5%5E2%2B%2810%2A-5%29-10=-85\"$
\n" ); document.write( "Ed Jones \n" ); document.write( "

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