document.write( "Question 33190: 6. What is the directrix of the parabola with the equation $\"y%2B3=%281%2F10%29+%28x%2B2%29%5E2\"$ ? \n" ); document.write( "

Algebra.Com's Answer #19633 by venugopalramana(3286) $\"\"$ $\"About$

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$\"y%2B3=%281%2F10%29+%28x%2B2%29%5E2\"$
\n" ); document.write( "STANDARD EQN.OF PARABOLA IS
\n" ); document.write( "(X-H)^2=4A(Y-K)...WHERE
\n" ); document.write( "FOCUS IS (H,K+A)
\n" ); document.write( "DIRECTRIX IS Y-K+A=0
\n" ); document.write( "AXIS IS X-H=0
\n" ); document.write( "VERTEX IS (H,K)
\n" ); document.write( "HERE WE HAVE
\n" ); document.write( "(X+2)^2=10(Y+3)...SO COMPARING WE GET
\n" ); document.write( "H=-2.....K=-3.....4A=10...OR...A=2.5...HENCE
\n" ); document.write( "DIRECTRIX IS GIVEN BY
\n" ); document.write( "Y-K+A=0....OR.....
\n" ); document.write( "Y-(-3)+2.5=0
\n" ); document.write( "Y+3+2.5=0
\n" ); document.write( "Y+5.5=0
\n" ); document.write( "2Y+11=0 \n" ); document.write( "

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