document.write( "Question 63780: y=-2x^2-16x-35
\n" );
document.write( "find the vertex
\n" );
document.write( "find the equation of the axis of symetry
\n" );
document.write( "find the coordinates of the focus
\n" );
document.write( "find the equation of the directrix
\n" );
document.write( "find the length of the latus rectum
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #44482 by venugopalramana(3286)![]() ![]() You can put this solution on YOUR website! SEE THE FOLLOWING EXAMPLE AND TRY.IF STILL IN DIFFICULTY PLEASE COME BACK \n" ); document.write( "---------------------------------------------------------------------- \n" ); document.write( "(2) What is the (a)directrix and the (b)focus of the parabola y = x^2 - 5x + 4? \n" ); document.write( "Y = [X^2-2*X*(5/2)+(5/2)^2]-(5/2)^2+4 \n" ); document.write( "(X-2.5)^2 = (Y+2.25) \n" ); document.write( "COMPARING WITH STD. EQN. OF PARABOLA \n" ); document.write( "(X-H)^2 = 4A(Y-K) \n" ); document.write( "4A=1......A=1/4=0.25 \n" ); document.write( "VERTEX = (H,K)......= (2.5,-2.25) \n" ); document.write( "AXIS = X-H=0.......X-2.5=0 \n" ); document.write( "FOCUS = [H,K+A].....[2.5,-2.25+0.25]=(2.5,-2) \n" ); document.write( "DIRECTRIX = Y-K+A=0......Y+2.25+0.25=0.......Y+2.5=0 \n" ); document.write( " |