lissaa1 lissaa1

21-03-2017
Mathematics

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What is the vertex, y intercept, and a value of this equation? "y=-x^2-4x-1"?

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ghanami ghanami

24-03-2017

Hello :
y= -x²-4x-1
y = - (x²+4x+1)
y = - ((x²+4x+4)-4+1)
y = - ((x+2)²-3)
y = -(x+2)²+3 the vertex is A(-2 ; 3)

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