document.write( "Question 421954: px^2+2qx+4=0,where p and q are constant,has equal roots.express q in term of p. \n" ); document.write( "

Algebra.Com's Answer #294585 by Gogonati(855) $\"\"$ $\"About$

You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( " $\"p%2Ax%5E2%2B2q%2Ax%2B4=0\"$ is a quadratic equation.Since it has two equal roots the discriminant is zero.\r
\n" ); document.write( "\n" ); document.write( " $\"D=b%5E2-4ac\"$ $\"D=%282q%29%5E2-4p%2A%284%29\"$ = $\"D=4q%5E2-16p\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"4%28q%5E2-4p%29=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"q%5E2-4p=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"q+=%28%2B-sqrt%284p%29%29\"$ \n" ); document.write( "

\n" );