document.write( "Question 921337: Determine the quadratic equation if the difference of the squares of the roots is 95 and their difference is 5. \n" ); document.write( "
Algebra.Com's Answer #558939 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "let the roots be: \r
\n" ); document.write( "\n" ); document.write( "\"x%5B1%5D+\"and \"x%5B2%5D\"\r
\n" ); document.write( "\n" ); document.write( " the difference of the squares of the roots is \"95\"
\n" ); document.write( "\"%28x%5B1%5D%29%5E2+-%28+x%5B2%5D%29%5E2=95\".............eq.1\r
\n" ); document.write( "\n" ); document.write( "their difference is \"5+\"\r
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\n" ); document.write( "\"x%5B1%5D+-+x%5B2%5D=5\" ............eq.2 \r
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\n" ); document.write( "\n" ); document.write( "solve the system:\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5B1%5D%29%5E2+-%28+x%5B2%5D%29%5E2=95\".............eq.1
\n" ); document.write( "\"x%5B1%5D+-+x%5B2%5D=5\" ............eq.2
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\n" ); document.write( "\n" ); document.write( "start with \"x%5B1%5D-x%5B2%5D=5\" ............eq.2 ...solve for\"+x%5B1%5D+\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5B1%5D+=5%2Bx%5B2%5D+\".............substitute in eq.1\r
\n" ); document.write( "\n" ); document.write( "\"%285%2Bx%5B2%5D+%29%5E2+-%28+x%5B2%5D%29%5E2=95\".............eq.1....solve for\"+x%5B2%5D+\"\r
\n" ); document.write( "\n" ); document.write( "\"25%2B10x%5B2%5D+%2Bx%5B2%5D+%5E2+-%28+x%5B2%5D%29%5E2=95\"\r
\n" ); document.write( "\n" ); document.write( "\"25%2B10x%5B2%5D+%2Bcross%28x%5B2%5D+%5E2%29+-cross%28%28+x%5B2%5D%29%5E2%29=95\"\r
\n" ); document.write( "\n" ); document.write( "\"10x%5B2%5D+=95-25\"\r
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\n" ); document.write( "\n" ); document.write( "\"10x%5B2%5D+=70\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5B2%5D+=70%2F10\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28x%5B2%5D+=7%29\"\r
\n" ); document.write( "\n" ); document.write( "go to\"+x%5B1%5D+=5%2Bx%5B2%5D+\" plug in \"x%5B2%5D+=7\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5B1%5D+=5%2B7\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28x%5B1%5D+=12%29\"\r
\n" ); document.write( "\n" ); document.write( "roots are: \"7\" and \"12\"\r
\n" ); document.write( "\n" ); document.write( "use zero product rule\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%28x-x%5B1%5D%29%28x-x%5B2%5D%29\" ...........plug in\"+x%5B1%5D+=12\" and \"x%5B2%5D+=7\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%28x-12%29%28x-7%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=x%5E2-7x-12x%2B7%2A12\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"highlight%28f%28x%29=x%5E2-19x%2B84%29\"\r
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\n" ); document.write( "\n" ); document.write( "graph:\r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-15%2C+25%2C+-10%2C+100%2C+x%5E2-19x%2B84%29+\"
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