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  • 27-07-2017
  • Mathematics
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y=-4x^2-8x-13 find the vertex of this parabola

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ghanami
ghanami ghanami
  • 27-07-2017
hello : 
Y=-4x²-8x-13
   = -4(x²+2x) -13
   = -4 ((x² +2x+1)-1) -13
   = -4 (x+1)² +4 -13
Y=   -4 (x+1)² -9
the vertex is : (-1 , -9)


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