document.write( "Question 723947: The sum of two numbers is 10. The sum of their squares is 68 . Find the numbers.\r
\n" ); document.write( "\n" ); document.write( "Can you please help me? Thanks so much in advance:)
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Algebra.Com's Answer #443482 by MathLover1(20855)\"\" \"About 
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\n" ); document.write( "let numbers be \"x\" and \"y\"\r
\n" ); document.write( "\n" ); document.write( "given:\r
\n" ); document.write( "\n" ); document.write( "The sum of two numbers is \"10\".\r
\n" ); document.write( "\n" ); document.write( "\"x%2By=10\"....eq.1 \r
\n" ); document.write( "\n" ); document.write( "The sum of their squares is \"68\".\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2By%5E2=68\"....eq.2 \r
\n" ); document.write( "\n" ); document.write( "solve the system:\r
\n" ); document.write( "\n" ); document.write( "\"x%2By=10\"....eq.1
\n" ); document.write( "\"x%5E2%2By%5E2=68\"....eq.2
\n" ); document.write( "__________________________\r
\n" ); document.write( "\n" ); document.write( "start with eq.1\r
\n" ); document.write( "\n" ); document.write( "\"x%2By=10\"....eq.1 ...solve for \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"y=10-x\"..... substitute it in eq.2\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B%2810-x%29%5E2=68\"....eq.2 ...solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B10%5E2-20x%2Bx%5E2=68\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2%2B100-20x=68\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-20x%2B100-68=0\"\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-20x%2B32=0\".......simplify, divide all by \"2\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-10x%2B16=0\".......use quadratic formula\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-%28-10%29+%2B-+sqrt%28+%28-10%29%5E2-4%2A1%2A16+%29%29%2F%282%2A1%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%2810+%2B-+sqrt%28+100-64+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%2810+%2B-+sqrt%28+36+%29%29%2F2+\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%2810+%2B-+6%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%2810+%2B+6%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+16%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+8+\"\r
\n" ); document.write( "\n" ); document.write( "or\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%2810+-6%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+4%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+2\"\r
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\n" ); document.write( "\n" ); document.write( "now find \"y\"\r
\n" ); document.write( "\n" ); document.write( "\"y=10-x\"\r
\n" ); document.write( "\n" ); document.write( "\"y=10-8\"\r
\n" ); document.write( "\n" ); document.write( "\"y=2\"\r
\n" ); document.write( "\n" ); document.write( "or\r
\n" ); document.write( "\n" ); document.write( "\"y=10-x\"\r
\n" ); document.write( "\n" ); document.write( "\"y=10-2\"\r
\n" ); document.write( "\n" ); document.write( "\"y=8\"\r
\n" ); document.write( "\n" ); document.write( "solution pairs are: \"x+=+8+\" and \"y=2\"\r
\n" ); document.write( "\n" ); document.write( "or \"x+=+2+\" and \"y=8\"\r
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