document.write( "Question 519391: When the sum of 5 and twice a positive number is subtracted from the square of the number 0 results. Find the number. \n" ); document.write( "
Algebra.Com's Answer #345633 by mananth(16946)\"\" \"About 
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let the number be x
\n" ); document.write( "x^2-(2x+5)=0\r
\n" ); document.write( "\n" ); document.write( "x^2-2x-5=0\r
\n" ); document.write( "\n" ); document.write( "Find the roots of the equation by quadratic formula
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\n" ); document.write( "a= 1 ,b= -2 ,c= -5
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\n" ); document.write( "b^2-4ac= 4 + 20
\n" ); document.write( "b^2-4ac= 24
\n" ); document.write( "\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"
\n" ); document.write( "\"x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29\"
\n" ); document.write( "\"x1=%28-12%2B21%29%2F%2812%29\"
\n" ); document.write( "x1=( 2 + 4.9 )/ 2
\n" ); document.write( "x1= 3.45
\n" ); document.write( "x2=( 2 -4.9 ) / 2
\n" ); document.write( "x2= -1.45
\n" ); document.write( "Ignore negative value
\n" ); document.write( "3.45 is the number\r
\n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca
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