document.write( "Question 849018: Find the vertex, focus and directrix of the parabola y= -3x^2+12x-8 without completing the square and determine whether the parabola opens upward or downward \n" ); document.write( "

Algebra.Com's Answer #511341 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( " y= -3x^2+12x-8
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document.write( "  midpoint = = 2  0r simply 
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document.write( "Parabola Opening downward:   
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document.write( ", 4 + (-1/12) = 47/12 Focus(2,47/12)
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document.write( "directrix is y = 4+1/12 = 49/12
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