Question 1026286: Sketch the graph of each function:
y=x^2+8x+15
I need the vertex and y and X intercepts, thank you.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Sketch the graph of each function:
y=x^2+8x+15
I need the vertex and y and X intercepts, thank you.
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Vertex occurs where x = -b/(2a) = -8/(2) = -4
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Vertex:: (-4,f(-4)) = (-4,-1)
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X int ?
Let y = 0 ; solve for "x"::
x^2+8x+15 = 0
(x+5)(x+3) = 0
x = -5 or x = -3
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y int ?
Let x = 0
y = 0^2 + 8*0 + 5
y = 5
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Cheers,
Stan H.
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