document.write( "Question 281519: How do I solve the sum of twice a number and its square is 143? I can write out the equation, but I don't know the answer. \n" ); document.write( "

Algebra.Com's Answer #204516 by JBarnum(2146) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x%2Bx%5E2=143\"$ this is a quadratic equation , set it equal to 0
\n" ); document.write( " $\"x%5E2%2B2x-143=0\"$ a=1 b=2 c=-143
\n" ); document.write( " $\"-b%2B%28%28sqrt%28b%5E2-4ac%29%29%2F2a%29\"$ $\"-b-%28%28sqrt%28b%5E2-4ac%29%29%2F2a%29\"$
\n" ); document.write( " $\"-2%2B%28%28sqrt%282%5E2-4%2A1%2A-143%29%29%2F%282%2A1%29%29\"$ $\"-2-%28%28sqrt%282%5E2-4%2A1%2A-143%29%29%2F%282%2A1%29%29\"$
\n" ); document.write( " $\"-2%2B%28%28sqrt%284%2B572%29%29%2F2%29\"$ $\"-2-%28%28sqrt%284%2B572%29%29%2F2%29\"$
\n" ); document.write( " $\"-2%2B%28%28sqrt%28576%29%29%2F2%29\"$ $\"-2-%28%28sqrt%28576%29%29%2F2%29\"$
\n" ); document.write( " $\"-2%2B%2824%2F2%29\"$ $\"-2-%2824%2F2%29\"$
\n" ); document.write( " $\"-2%2B%2812%29\"$ $\"-2-%2812%29\"$
\n" ); document.write( "x= $\"highlight%2810%29\"$ , $\"highlight%28-14%29\"$ \n" ); document.write( "

\n" );