document.write( "Question 997519: form a quadratic equation in x whose roots are the squares of the roots of 2x^2-8x+1=0 \n" ); document.write( "
Algebra.Com's Answer #615565 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "a quadratic equation in \"x\" whose roots are the \"squares\" of the roots of
\n" ); document.write( "\"2x%5E2-8x%2B1=0\"\r
\n" ); document.write( "\n" ); document.write( "find the roots of\r
\n" ); document.write( "\n" ); document.write( "\"2x%5E2-8x%2B1=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-%28-8%29+%2B-+sqrt%28+%28-8%29%5E2-4%2A2%2A1+%29%29%2F%282%2A2%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%288+%2B-+sqrt%2864-8+%29%29%2F4+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%288+%2B-+sqrt%2856+%29%29%2F4+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%288+%2B-+sqrt%284%2A14+%29%29%2F4+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28cross%288%294+%2B-+cross%282%29sqrt%2814+%29%29%2Fcross%284%292+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%284+%2B-+sqrt%2814+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "so, exact roots are:\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%284+%2B+sqrt%2814+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%284+-+sqrt%2814+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "approximate:\r
\n" ); document.write( "\n" ); document.write( "\"x%5B1%5D+=+%284+%2B+3.741657386773941%29%2F2+=7.741657386773941%2F2=3.87\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5B2%5D+=+%284+-+3.741657386773941%29%2F2=+0.2583426132260586%2F2=0.13\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "now find their squares:\r
\n" ); document.write( "\n" ); document.write( "\"x%5B1%5D%5E2+=+14.98\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5B2%5D%5E2+=0.0169\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "now use zero product formula to find your equation:\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%28x-x%5B1%5D%29%28x-x%5B2%5D%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%28x-14.98%29%28x-0.0169%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=x%5E2-0.0169x-14.98x-14.98%2A%28-0.0169%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=x%5E2-14.9969x%2B0.253162\"\r
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